gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  31 # needed and used only for URLs with nonempty PATH_INFO
  32 our $base_url = $my_url;
  33
  34 # When the script is used as DirectoryIndex, the URL does not contain the name
  35 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  36 # have to do it ourselves. We make $path_info global because it's also used
  37 # later on.
  38 #
  39 # Another issue with the script being the DirectoryIndex is that the resulting
  40 # $my_url data is not the full script URL: this is good, because we want
  41 # generated links to keep implying the script name if it wasn't explicitly
  42 # indicated in the URL we're handling, but it means that $my_url cannot be used
  43 # as base URL.
  44 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  45 # to build the base URL ourselves:
  46 our $path_info = $ENV{"PATH_INFO"};
  47 if ($path_info) {
  48         if ($my_url =~ s,\Q$path_info\E$,, &&
  49             $my_uri =~ s,\Q$path_info\E$,, &&
  50             defined $ENV{'SCRIPT_NAME'}) {
  51                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  52         }
  53 }
  54
  55 # core git executable to use
  56 # this can just be "git" if your webserver has a sensible PATH
  57 our $GIT = "++GIT_BINDIR++/git";
  58
  59 # absolute fs-path which will be prepended to the project path
  60 #our $projectroot = "/pub/scm";
  61 our $projectroot = "++GITWEB_PROJECTROOT++";
  62
  63 # fs traversing limit for getting project list
  64 # the number is relative to the projectroot
  65 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  66
  67 # target of the home link on top of all pages
  68 our $home_link = $my_uri || "/";
  69
  70 # string of the home link on top of all pages
  71 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  72
  73 # name of your site or organization to appear in page titles
  74 # replace this with something more descriptive for clearer bookmarks
  75 our $site_name = "++GITWEB_SITENAME++"
  76                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  77
  78 # filename of html text to include at top of each page
  79 our $site_header = "++GITWEB_SITE_HEADER++";
  80 # html text to include at home page
  81 our $home_text = "++GITWEB_HOMETEXT++";
  82 # filename of html text to include at bottom of each page
  83 our $site_footer = "++GITWEB_SITE_FOOTER++";
  84
  85 # URI of stylesheets
  86 our @stylesheets = ("++GITWEB_CSS++");
  87 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  88 our $stylesheet = undef;
  89 # URI of GIT logo (72x27 size)
  90 our $logo = "++GITWEB_LOGO++";
  91 # URI of GIT favicon, assumed to be image/png type
  92 our $favicon = "++GITWEB_FAVICON++";
  93
  94 # URI and label (title) of GIT logo link
  95 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  96 #our $logo_label = "git documentation";
  97 our $logo_url = "http://git-scm.com/";
  98 our $logo_label = "git homepage";
  99
 100 # source of projects list
 101 our $projects_list = "++GITWEB_LIST++";
 102
 103 # the width (in characters) of the projects list "Description" column
 104 our $projects_list_description_width = 25;
 105
 106 # default order of projects list
 107 # valid values are none, project, descr, owner, and age
 108 our $default_projects_order = "project";
 109
 110 # show repository only if this file exists
 111 # (only effective if this variable evaluates to true)
 112 our $export_ok = "++GITWEB_EXPORT_OK++";
 113
 114 # show repository only if this subroutine returns true
 115 # when given the path to the project, for example:
 116 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 117 our $export_auth_hook = undef;
 118
 119 # only allow viewing of repositories also shown on the overview page
 120 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 121
 122 # list of git base URLs used for URL to where fetch project from,
 123 # i.e. full URL is "$git_base_url/$project"
 124 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 125
 126 # default blob_plain mimetype and default charset for text/plain blob
 127 our $default_blob_plain_mimetype = 'text/plain';
 128 our $default_text_plain_charset  = undef;
 129
 130 # file to use for guessing MIME types before trying /etc/mime.types
 131 # (relative to the current git repository)
 132 our $mimetypes_file = undef;
 133
 134 # assume this charset if line contains non-UTF-8 characters;
 135 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 136 # for which encoding all byte sequences are valid, for example
 137 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 138 # could be even 'utf-8' for the old behavior)
 139 our $fallback_encoding = 'latin1';
 140
 141 # rename detection options for git-diff and git-diff-tree
 142 # - default is '-M', with the cost proportional to
 143 #   (number of removed files) * (number of new files).
 144 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 145 #   (number of changed files + number of removed files) * (number of new files)
 146 # - even more costly is '-C', '--find-copies-harder' with cost
 147 #   (number of files in the original tree) * (number of new files)
 148 # - one might want to include '-B' option, e.g. '-B', '-M'
 149 our @diff_opts = ('-M'); # taken from git_commit
 150
 151 # Disables features that would allow repository owners to inject script into
 152 # the gitweb domain.
 153 our $prevent_xss = 0;
 154
 155 # information about snapshot formats that gitweb is capable of serving
 156 our %known_snapshot_formats = (
 157         # name => {
 158         #       'display' => display name,
 159         #       'type' => mime type,
 160         #       'suffix' => filename suffix,
 161         #       'format' => --format for git-archive,
 162         #       'compressor' => [compressor command and arguments]
 163         #                       (array reference, optional)
 164         #       'disabled' => boolean (optional)}
 165         #
 166         'tgz' => {
 167                 'display' => 'tar.gz',
 168                 'type' => 'application/x-gzip',
 169                 'suffix' => '.tar.gz',
 170                 'format' => 'tar',
 171                 'compressor' => ['gzip']},
 172
 173         'tbz2' => {
 174                 'display' => 'tar.bz2',
 175                 'type' => 'application/x-bzip2',
 176                 'suffix' => '.tar.bz2',
 177                 'format' => 'tar',
 178                 'compressor' => ['bzip2']},
 179
 180         'txz' => {
 181                 'display' => 'tar.xz',
 182                 'type' => 'application/x-xz',
 183                 'suffix' => '.tar.xz',
 184                 'format' => 'tar',
 185                 'compressor' => ['xz'],
 186                 'disabled' => 1},
 187
 188         'zip' => {
 189                 'display' => 'zip',
 190                 'type' => 'application/x-zip',
 191                 'suffix' => '.zip',
 192                 'format' => 'zip'},
 193 );
 194
 195 # Aliases so we understand old gitweb.snapshot values in repository
 196 # configuration.
 197 our %known_snapshot_format_aliases = (
 198         'gzip'  => 'tgz',
 199         'bzip2' => 'tbz2',
 200         'xz'    => 'txz',
 201
 202         # backward compatibility: legacy gitweb config support
 203         'x-gzip' => undef, 'gz' => undef,
 204         'x-bzip2' => undef, 'bz2' => undef,
 205         'x-zip' => undef, '' => undef,
 206 );
 207
 208 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 209 # are changed, it may be appropriate to change these values too via
 210 # $GITWEB_CONFIG.
 211 our %avatar_size = (
 212         'default' => 16,
 213         'double'  => 32
 214 );
 215
 216 # You define site-wide feature defaults here; override them with
 217 # $GITWEB_CONFIG as necessary.
 218 our %feature = (
 219         # feature => {
 220         #       'sub' => feature-sub (subroutine),
 221         #       'override' => allow-override (boolean),
 222         #       'default' => [ default options...] (array reference)}
 223         #
 224         # if feature is overridable (it means that allow-override has true value),
 225         # then feature-sub will be called with default options as parameters;
 226         # return value of feature-sub indicates if to enable specified feature
 227         #
 228         # if there is no 'sub' key (no feature-sub), then feature cannot be
 229         # overriden
 230         #
 231         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 232         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 233         # is enabled
 234
 235         # Enable the 'blame' blob view, showing the last commit that modified
 236         # each line in the file. This can be very CPU-intensive.
 237
 238         # To enable system wide have in $GITWEB_CONFIG
 239         # $feature{'blame'}{'default'} = [1];
 240         # To have project specific config enable override in $GITWEB_CONFIG
 241         # $feature{'blame'}{'override'} = 1;
 242         # and in project config gitweb.blame = 0|1;
 243         'blame' => {
 244                 'sub' => sub { feature_bool('blame', @_) },
 245                 'override' => 0,
 246                 'default' => [0]},
 247
 248         # Enable the 'snapshot' link, providing a compressed archive of any
 249         # tree. This can potentially generate high traffic if you have large
 250         # project.
 251
 252         # Value is a list of formats defined in %known_snapshot_formats that
 253         # you wish to offer.
 254         # To disable system wide have in $GITWEB_CONFIG
 255         # $feature{'snapshot'}{'default'} = [];
 256         # To have project specific config enable override in $GITWEB_CONFIG
 257         # $feature{'snapshot'}{'override'} = 1;
 258         # and in project config, a comma-separated list of formats or "none"
 259         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 260         'snapshot' => {
 261                 'sub' => \&feature_snapshot,
 262                 'override' => 0,
 263                 'default' => ['tgz']},
 264
 265         # Enable text search, which will list the commits which match author,
 266         # committer or commit text to a given string.  Enabled by default.
 267         # Project specific override is not supported.
 268         'search' => {
 269                 'override' => 0,
 270                 'default' => [1]},
 271
 272         # Enable grep search, which will list the files in currently selected
 273         # tree containing the given string. Enabled by default. This can be
 274         # potentially CPU-intensive, of course.
 275
 276         # To enable system wide have in $GITWEB_CONFIG
 277         # $feature{'grep'}{'default'} = [1];
 278         # To have project specific config enable override in $GITWEB_CONFIG
 279         # $feature{'grep'}{'override'} = 1;
 280         # and in project config gitweb.grep = 0|1;
 281         'grep' => {
 282                 'sub' => sub { feature_bool('grep', @_) },
 283                 'override' => 0,
 284                 'default' => [1]},
 285
 286         # Enable the pickaxe search, which will list the commits that modified
 287         # a given string in a file. This can be practical and quite faster
 288         # alternative to 'blame', but still potentially CPU-intensive.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'pickaxe'}{'default'} = [1];
 292         # To have project specific config enable override in $GITWEB_CONFIG
 293         # $feature{'pickaxe'}{'override'} = 1;
 294         # and in project config gitweb.pickaxe = 0|1;
 295         'pickaxe' => {
 296                 'sub' => sub { feature_bool('pickaxe', @_) },
 297                 'override' => 0,
 298                 'default' => [1]},
 299
 300         # Enable showing size of blobs in a 'tree' view, in a separate
 301         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 302
 303         # To disable system wide have in $GITWEB_CONFIG
 304         # $feature{'show-sizes'}{'default'} = [0];
 305         # To have project specific config enable override in $GITWEB_CONFIG
 306         # $feature{'show-sizes'}{'override'} = 1;
 307         # and in project config gitweb.showsizes = 0|1;
 308         'show-sizes' => {
 309                 'sub' => sub { feature_bool('showsizes', @_) },
 310                 'override' => 0,
 311                 'default' => [1]},
 312
 313         # Make gitweb use an alternative format of the URLs which can be
 314         # more readable and natural-looking: project name is embedded
 315         # directly in the path and the query string contains other
 316         # auxiliary information. All gitweb installations recognize
 317         # URL in either format; this configures in which formats gitweb
 318         # generates links.
 319
 320         # To enable system wide have in $GITWEB_CONFIG
 321         # $feature{'pathinfo'}{'default'} = [1];
 322         # Project specific override is not supported.
 323
 324         # Note that you will need to change the default location of CSS,
 325         # favicon, logo and possibly other files to an absolute URL. Also,
 326         # if gitweb.cgi serves as your indexfile, you will need to force
 327         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 328         'pathinfo' => {
 329                 'override' => 0,
 330                 'default' => [0]},
 331
 332         # Make gitweb consider projects in project root subdirectories
 333         # to be forks of existing projects. Given project $projname.git,
 334         # projects matching $projname/*.git will not be shown in the main
 335         # projects list, instead a '+' mark will be added to $projname
 336         # there and a 'forks' view will be enabled for the project, listing
 337         # all the forks. If project list is taken from a file, forks have
 338         # to be listed after the main project.
 339
 340         # To enable system wide have in $GITWEB_CONFIG
 341         # $feature{'forks'}{'default'} = [1];
 342         # Project specific override is not supported.
 343         'forks' => {
 344                 'override' => 0,
 345                 'default' => [0]},
 346
 347         # Insert custom links to the action bar of all project pages.
 348         # This enables you mainly to link to third-party scripts integrating
 349         # into gitweb; e.g. git-browser for graphical history representation
 350         # or custom web-based repository administration interface.
 351
 352         # The 'default' value consists of a list of triplets in the form
 353         # (label, link, position) where position is the label after which
 354         # to insert the link and link is a format string where %n expands
 355         # to the project name, %f to the project path within the filesystem,
 356         # %h to the current hash (h gitweb parameter) and %b to the current
 357         # hash base (hb gitweb parameter); %% expands to %.
 358
 359         # To enable system wide have in $GITWEB_CONFIG e.g.
 360         # $feature{'actions'}{'default'} = [('graphiclog',
 361         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 362         # Project specific override is not supported.
 363         'actions' => {
 364                 'override' => 0,
 365                 'default' => []},
 366
 367         # Allow gitweb scan project content tags described in ctags/
 368         # of project repository, and display the popular Web 2.0-ish
 369         # "tag cloud" near the project list. Note that this is something
 370         # COMPLETELY different from the normal Git tags.
 371
 372         # gitweb by itself can show existing tags, but it does not handle
 373         # tagging itself; you need an external application for that.
 374         # For an example script, check Girocco's cgi/tagproj.cgi.
 375         # You may want to install the HTML::TagCloud Perl module to get
 376         # a pretty tag cloud instead of just a list of tags.
 377
 378         # To enable system wide have in $GITWEB_CONFIG
 379         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 380         # Project specific override is not supported.
 381         'ctags' => {
 382                 'override' => 0,
 383                 'default' => [0]},
 384
 385         # The maximum number of patches in a patchset generated in patch
 386         # view. Set this to 0 or undef to disable patch view, or to a
 387         # negative number to remove any limit.
 388
 389         # To disable system wide have in $GITWEB_CONFIG
 390         # $feature{'patches'}{'default'} = [0];
 391         # To have project specific config enable override in $GITWEB_CONFIG
 392         # $feature{'patches'}{'override'} = 1;
 393         # and in project config gitweb.patches = 0|n;
 394         # where n is the maximum number of patches allowed in a patchset.
 395         'patches' => {
 396                 'sub' => \&feature_patches,
 397                 'override' => 0,
 398                 'default' => [16]},
 399
 400         # Avatar support. When this feature is enabled, views such as
 401         # shortlog or commit will display an avatar associated with
 402         # the email of the committer(s) and/or author(s).
 403
 404         # Currently available providers are gravatar and picon.
 405         # If an unknown provider is specified, the feature is disabled.
 406
 407         # Gravatar depends on Digest::MD5.
 408         # Picon currently relies on the indiana.edu database.
 409
 410         # To enable system wide have in $GITWEB_CONFIG
 411         # $feature{'avatar'}{'default'} = ['<provider>'];
 412         # where <provider> is either gravatar or picon.
 413         # To have project specific config enable override in $GITWEB_CONFIG
 414         # $feature{'avatar'}{'override'} = 1;
 415         # and in project config gitweb.avatar = <provider>;
 416         'avatar' => {
 417                 'sub' => \&feature_avatar,
 418                 'override' => 0,
 419                 'default' => ['']},
 420 );
 421
 422 sub gitweb_get_feature {
 423         my ($name) = @_;
 424         return unless exists $feature{$name};
 425         my ($sub, $override, @defaults) = (
 426                 $feature{$name}{'sub'},
 427                 $feature{$name}{'override'},
 428                 @{$feature{$name}{'default'}});
 429         if (!$override) { return @defaults; }
 430         if (!defined $sub) {
 431                 warn "feature $name is not overridable";
 432                 return @defaults;
 433         }
 434         return $sub->(@defaults);
 435 }
 436
 437 # A wrapper to check if a given feature is enabled.
 438 # With this, you can say
 439 #
 440 #   my $bool_feat = gitweb_check_feature('bool_feat');
 441 #   gitweb_check_feature('bool_feat') or somecode;
 442 #
 443 # instead of
 444 #
 445 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 446 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 447 #
 448 sub gitweb_check_feature {
 449         return (gitweb_get_feature(@_))[0];
 450 }
 451
 452
 453 sub feature_bool {
 454         my $key = shift;
 455         my ($val) = git_get_project_config($key, '--bool');
 456
 457         if (!defined $val) {
 458                 return ($_[0]);
 459         } elsif ($val eq 'true') {
 460                 return (1);
 461         } elsif ($val eq 'false') {
 462                 return (0);
 463         }
 464 }
 465
 466 sub feature_snapshot {
 467         my (@fmts) = @_;
 468
 469         my ($val) = git_get_project_config('snapshot');
 470
 471         if ($val) {
 472                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 473         }
 474
 475         return @fmts;
 476 }
 477
 478 sub feature_patches {
 479         my @val = (git_get_project_config('patches', '--int'));
 480
 481         if (@val) {
 482                 return @val;
 483         }
 484
 485         return ($_[0]);
 486 }
 487
 488 sub feature_avatar {
 489         my @val = (git_get_project_config('avatar'));
 490
 491         return @val ? @val : @_;
 492 }
 493
 494 # checking HEAD file with -e is fragile if the repository was
 495 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 496 # and then pruned.
 497 sub check_head_link {
 498         my ($dir) = @_;
 499         my $headfile = "$dir/HEAD";
 500         return ((-e $headfile) ||
 501                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 502 }
 503
 504 sub check_export_ok {
 505         my ($dir) = @_;
 506         return (check_head_link($dir) &&
 507                 (!$export_ok || -e "$dir/$export_ok") &&
 508                 (!$export_auth_hook || $export_auth_hook->($dir)));
 509 }
 510
 511 # process alternate names for backward compatibility
 512 # filter out unsupported (unknown) snapshot formats
 513 sub filter_snapshot_fmts {
 514         my @fmts = @_;
 515
 516         @fmts = map {
 517                 exists $known_snapshot_format_aliases{$_} ?
 518                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 519         @fmts = grep {
 520                 exists $known_snapshot_formats{$_} &&
 521                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 522 }
 523
 524 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 525 if (-e $GITWEB_CONFIG) {
 526         do $GITWEB_CONFIG;
 527 } else {
 528         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 529         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 530 }
 531
 532 # version of the core git binary
 533 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 534
 535 $projects_list ||= $projectroot;
 536
 537 # ======================================================================
 538 # input validation and dispatch
 539
 540 # input parameters can be collected from a variety of sources (presently, CGI
 541 # and PATH_INFO), so we define an %input_params hash that collects them all
 542 # together during validation: this allows subsequent uses (e.g. href()) to be
 543 # agnostic of the parameter origin
 544
 545 our %input_params = ();
 546
 547 # input parameters are stored with the long parameter name as key. This will
 548 # also be used in the href subroutine to convert parameters to their CGI
 549 # equivalent, and since the href() usage is the most frequent one, we store
 550 # the name -> CGI key mapping here, instead of the reverse.
 551 #
 552 # XXX: Warning: If you touch this, check the search form for updating,
 553 # too.
 554
 555 our @cgi_param_mapping = (
 556         project => "p",
 557         action => "a",
 558         file_name => "f",
 559         file_parent => "fp",
 560         hash => "h",
 561         hash_parent => "hp",
 562         hash_base => "hb",
 563         hash_parent_base => "hpb",
 564         page => "pg",
 565         order => "o",
 566         searchtext => "s",
 567         searchtype => "st",
 568         snapshot_format => "sf",
 569         extra_options => "opt",
 570         search_use_regexp => "sr",
 571 );
 572 our %cgi_param_mapping = @cgi_param_mapping;
 573
 574 # we will also need to know the possible actions, for validation
 575 our %actions = (
 576         "blame" => \&git_blame,
 577         "blobdiff" => \&git_blobdiff,
 578         "blobdiff_plain" => \&git_blobdiff_plain,
 579         "blob" => \&git_blob,
 580         "blob_plain" => \&git_blob_plain,
 581         "commitdiff" => \&git_commitdiff,
 582         "commitdiff_plain" => \&git_commitdiff_plain,
 583         "commit" => \&git_commit,
 584         "forks" => \&git_forks,
 585         "heads" => \&git_heads,
 586         "history" => \&git_history,
 587         "log" => \&git_log,
 588         "patch" => \&git_patch,
 589         "patches" => \&git_patches,
 590         "rss" => \&git_rss,
 591         "atom" => \&git_atom,
 592         "search" => \&git_search,
 593         "search_help" => \&git_search_help,
 594         "shortlog" => \&git_shortlog,
 595         "summary" => \&git_summary,
 596         "tag" => \&git_tag,
 597         "tags" => \&git_tags,
 598         "tree" => \&git_tree,
 599         "snapshot" => \&git_snapshot,
 600         "object" => \&git_object,
 601         # those below don't need $project
 602         "opml" => \&git_opml,
 603         "project_list" => \&git_project_list,
 604         "project_index" => \&git_project_index,
 605 );
 606
 607 # finally, we have the hash of allowed extra_options for the commands that
 608 # allow them
 609 our %allowed_options = (
 610         "--no-merges" => [ qw(rss atom log shortlog history) ],
 611 );
 612
 613 # fill %input_params with the CGI parameters. All values except for 'opt'
 614 # should be single values, but opt can be an array. We should probably
 615 # build an array of parameters that can be multi-valued, but since for the time
 616 # being it's only this one, we just single it out
 617 while (my ($name, $symbol) = each %cgi_param_mapping) {
 618         if ($symbol eq 'opt') {
 619                 $input_params{$name} = [ $cgi->param($symbol) ];
 620         } else {
 621                 $input_params{$name} = $cgi->param($symbol);
 622         }
 623 }
 624
 625 # now read PATH_INFO and update the parameter list for missing parameters
 626 sub evaluate_path_info {
 627         return if defined $input_params{'project'};
 628         return if !$path_info;
 629         $path_info =~ s,^/+,,;
 630         return if !$path_info;
 631
 632         # find which part of PATH_INFO is project
 633         my $project = $path_info;
 634         $project =~ s,/+$,,;
 635         while ($project && !check_head_link("$projectroot/$project")) {
 636                 $project =~ s,/*[^/]*$,,;
 637         }
 638         return unless $project;
 639         $input_params{'project'} = $project;
 640
 641         # do not change any parameters if an action is given using the query string
 642         return if $input_params{'action'};
 643         $path_info =~ s,^\Q$project\E/*,,;
 644
 645         # next, check if we have an action
 646         my $action = $path_info;
 647         $action =~ s,/.*$,,;
 648         if (exists $actions{$action}) {
 649                 $path_info =~ s,^$action/*,,;
 650                 $input_params{'action'} = $action;
 651         }
 652
 653         # list of actions that want hash_base instead of hash, but can have no
 654         # pathname (f) parameter
 655         my @wants_base = (
 656                 'tree',
 657                 'history',
 658         );
 659
 660         # we want to catch
 661         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 662         my ($parentrefname, $parentpathname, $refname, $pathname) =
 663                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 664
 665         # first, analyze the 'current' part
 666         if (defined $pathname) {
 667                 # we got "branch:filename" or "branch:dir/"
 668                 # we could use git_get_type(branch:pathname), but:
 669                 # - it needs $git_dir
 670                 # - it does a git() call
 671                 # - the convention of terminating directories with a slash
 672                 #   makes it superfluous
 673                 # - embedding the action in the PATH_INFO would make it even
 674                 #   more superfluous
 675                 $pathname =~ s,^/+,,;
 676                 if (!$pathname || substr($pathname, -1) eq "/") {
 677                         $input_params{'action'} ||= "tree";
 678                         $pathname =~ s,/$,,;
 679                 } else {
 680                         # the default action depends on whether we had parent info
 681                         # or not
 682                         if ($parentrefname) {
 683                                 $input_params{'action'} ||= "blobdiff_plain";
 684                         } else {
 685                                 $input_params{'action'} ||= "blob_plain";
 686                         }
 687                 }
 688                 $input_params{'hash_base'} ||= $refname;
 689                 $input_params{'file_name'} ||= $pathname;
 690         } elsif (defined $refname) {
 691                 # we got "branch". In this case we have to choose if we have to
 692                 # set hash or hash_base.
 693                 #
 694                 # Most of the actions without a pathname only want hash to be
 695                 # set, except for the ones specified in @wants_base that want
 696                 # hash_base instead. It should also be noted that hand-crafted
 697                 # links having 'history' as an action and no pathname or hash
 698                 # set will fail, but that happens regardless of PATH_INFO.
 699                 $input_params{'action'} ||= "shortlog";
 700                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 701                         $input_params{'hash_base'} ||= $refname;
 702                 } else {
 703                         $input_params{'hash'} ||= $refname;
 704                 }
 705         }
 706
 707         # next, handle the 'parent' part, if present
 708         if (defined $parentrefname) {
 709                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 710                 # someproject/blobdiff/oldrev..newrev:/filename
 711                 if ($parentpathname) {
 712                         $parentpathname =~ s,^/+,,;
 713                         $parentpathname =~ s,/$,,;
 714                         $input_params{'file_parent'} ||= $parentpathname;
 715                 } else {
 716                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 717                 }
 718                 # we assume that hash_parent_base is wanted if a path was specified,
 719                 # or if the action wants hash_base instead of hash
 720                 if (defined $input_params{'file_parent'} ||
 721                         grep { $_ eq $input_params{'action'} } @wants_base) {
 722                         $input_params{'hash_parent_base'} ||= $parentrefname;
 723                 } else {
 724                         $input_params{'hash_parent'} ||= $parentrefname;
 725                 }
 726         }
 727
 728         # for the snapshot action, we allow URLs in the form
 729         # $project/snapshot/$hash.ext
 730         # where .ext determines the snapshot and gets removed from the
 731         # passed $refname to provide the $hash.
 732         #
 733         # To be able to tell that $refname includes the format extension, we
 734         # require the following two conditions to be satisfied:
 735         # - the hash input parameter MUST have been set from the $refname part
 736         #   of the URL (i.e. they must be equal)
 737         # - the snapshot format MUST NOT have been defined already (e.g. from
 738         #   CGI parameter sf)
 739         # It's also useless to try any matching unless $refname has a dot,
 740         # so we check for that too
 741         if (defined $input_params{'action'} &&
 742                 $input_params{'action'} eq 'snapshot' &&
 743                 defined $refname && index($refname, '.') != -1 &&
 744                 $refname eq $input_params{'hash'} &&
 745                 !defined $input_params{'snapshot_format'}) {
 746                 # We loop over the known snapshot formats, checking for
 747                 # extensions. Allowed extensions are both the defined suffix
 748                 # (which includes the initial dot already) and the snapshot
 749                 # format key itself, with a prepended dot
 750                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 751                         my $hash = $refname;
 752                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 753                                 next;
 754                         }
 755                         my $sfx = $1;
 756                         # a valid suffix was found, so set the snapshot format
 757                         # and reset the hash parameter
 758                         $input_params{'snapshot_format'} = $fmt;
 759                         $input_params{'hash'} = $hash;
 760                         # we also set the format suffix to the one requested
 761                         # in the URL: this way a request for e.g. .tgz returns
 762                         # a .tgz instead of a .tar.gz
 763                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 764                         last;
 765                 }
 766         }
 767 }
 768 evaluate_path_info();
 769
 770 our $action = $input_params{'action'};
 771 if (defined $action) {
 772         if (!validate_action($action)) {
 773                 die_error(400, "Invalid action parameter");
 774         }
 775 }
 776
 777 # parameters which are pathnames
 778 our $project = $input_params{'project'};
 779 if (defined $project) {
 780         if (!validate_project($project)) {
 781                 undef $project;
 782                 die_error(404, "No such project");
 783         }
 784 }
 785
 786 our $file_name = $input_params{'file_name'};
 787 if (defined $file_name) {
 788         if (!validate_pathname($file_name)) {
 789                 die_error(400, "Invalid file parameter");
 790         }
 791 }
 792
 793 our $file_parent = $input_params{'file_parent'};
 794 if (defined $file_parent) {
 795         if (!validate_pathname($file_parent)) {
 796                 die_error(400, "Invalid file parent parameter");
 797         }
 798 }
 799
 800 # parameters which are refnames
 801 our $hash = $input_params{'hash'};
 802 if (defined $hash) {
 803         if (!validate_refname($hash)) {
 804                 die_error(400, "Invalid hash parameter");
 805         }
 806 }
 807
 808 our $hash_parent = $input_params{'hash_parent'};
 809 if (defined $hash_parent) {
 810         if (!validate_refname($hash_parent)) {
 811                 die_error(400, "Invalid hash parent parameter");
 812         }
 813 }
 814
 815 our $hash_base = $input_params{'hash_base'};
 816 if (defined $hash_base) {
 817         if (!validate_refname($hash_base)) {
 818                 die_error(400, "Invalid hash base parameter");
 819         }
 820 }
 821
 822 our @extra_options = @{$input_params{'extra_options'}};
 823 # @extra_options is always defined, since it can only be (currently) set from
 824 # CGI, and $cgi->param() returns the empty array in array context if the param
 825 # is not set
 826 foreach my $opt (@extra_options) {
 827         if (not exists $allowed_options{$opt}) {
 828                 die_error(400, "Invalid option parameter");
 829         }
 830         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 831                 die_error(400, "Invalid option parameter for this action");
 832         }
 833 }
 834
 835 our $hash_parent_base = $input_params{'hash_parent_base'};
 836 if (defined $hash_parent_base) {
 837         if (!validate_refname($hash_parent_base)) {
 838                 die_error(400, "Invalid hash parent base parameter");
 839         }
 840 }
 841
 842 # other parameters
 843 our $page = $input_params{'page'};
 844 if (defined $page) {
 845         if ($page =~ m/[^0-9]/) {
 846                 die_error(400, "Invalid page parameter");
 847         }
 848 }
 849
 850 our $searchtype = $input_params{'searchtype'};
 851 if (defined $searchtype) {
 852         if ($searchtype =~ m/[^a-z]/) {
 853                 die_error(400, "Invalid searchtype parameter");
 854         }
 855 }
 856
 857 our $search_use_regexp = $input_params{'search_use_regexp'};
 858
 859 our $searchtext = $input_params{'searchtext'};
 860 our $search_regexp;
 861 if (defined $searchtext) {
 862         if (length($searchtext) < 2) {
 863                 die_error(403, "At least two characters are required for search parameter");
 864         }
 865         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 866 }
 867
 868 # path to the current git repository
 869 our $git_dir;
 870 $git_dir = "$projectroot/$project" if $project;
 871
 872 # list of supported snapshot formats
 873 our @snapshot_fmts = gitweb_get_feature('snapshot');
 874 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 875
 876 # check that the avatar feature is set to a known provider name,
 877 # and for each provider check if the dependencies are satisfied.
 878 # if the provider name is invalid or the dependencies are not met,
 879 # reset $git_avatar to the empty string.
 880 our ($git_avatar) = gitweb_get_feature('avatar');
 881 if ($git_avatar eq 'gravatar') {
 882         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 883 } elsif ($git_avatar eq 'picon') {
 884         # no dependencies
 885 } else {
 886         $git_avatar = '';
 887 }
 888
 889 # dispatch
 890 if (!defined $action) {
 891         if (defined $hash) {
 892                 $action = git_get_type($hash);
 893         } elsif (defined $hash_base && defined $file_name) {
 894                 $action = git_get_type("$hash_base:$file_name");
 895         } elsif (defined $project) {
 896                 $action = 'summary';
 897         } else {
 898                 $action = 'project_list';
 899         }
 900 }
 901 if (!defined($actions{$action})) {
 902         die_error(400, "Unknown action");
 903 }
 904 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 905     !$project) {
 906         die_error(400, "Project needed");
 907 }
 908 $actions{$action}->();
 909 exit;
 910
 911 ## ======================================================================
 912 ## action links
 913
 914 sub href {
 915         my %params = @_;
 916         # default is to use -absolute url() i.e. $my_uri
 917         my $href = $params{-full} ? $my_url : $my_uri;
 918
 919         $params{'project'} = $project unless exists $params{'project'};
 920
 921         if ($params{-replay}) {
 922                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 923                         if (!exists $params{$name}) {
 924                                 $params{$name} = $input_params{$name};
 925                         }
 926                 }
 927         }
 928
 929         my $use_pathinfo = gitweb_check_feature('pathinfo');
 930         if ($use_pathinfo and defined $params{'project'}) {
 931                 # try to put as many parameters as possible in PATH_INFO:
 932                 #   - project name
 933                 #   - action
 934                 #   - hash_parent or hash_parent_base:/file_parent
 935                 #   - hash or hash_base:/filename
 936                 #   - the snapshot_format as an appropriate suffix
 937
 938                 # When the script is the root DirectoryIndex for the domain,
 939                 # $href here would be something like http://gitweb.example.com/
 940                 # Thus, we strip any trailing / from $href, to spare us double
 941                 # slashes in the final URL
 942                 $href =~ s,/$,,;
 943
 944                 # Then add the project name, if present
 945                 $href .= "/".esc_url($params{'project'});
 946                 delete $params{'project'};
 947
 948                 # since we destructively absorb parameters, we keep this
 949                 # boolean that remembers if we're handling a snapshot
 950                 my $is_snapshot = $params{'action'} eq 'snapshot';
 951
 952                 # Summary just uses the project path URL, any other action is
 953                 # added to the URL
 954                 if (defined $params{'action'}) {
 955                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 956                         delete $params{'action'};
 957                 }
 958
 959                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 960                 # stripping nonexistent or useless pieces
 961                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 962                         || $params{'hash_parent'} || $params{'hash'});
 963                 if (defined $params{'hash_base'}) {
 964                         if (defined $params{'hash_parent_base'}) {
 965                                 $href .= esc_url($params{'hash_parent_base'});
 966                                 # skip the file_parent if it's the same as the file_name
 967                                 if (defined $params{'file_parent'}) {
 968                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 969                                                 delete $params{'file_parent'};
 970                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 971                                                 $href .= ":/".esc_url($params{'file_parent'});
 972                                                 delete $params{'file_parent'};
 973                                         }
 974                                 }
 975                                 $href .= "..";
 976                                 delete $params{'hash_parent'};
 977                                 delete $params{'hash_parent_base'};
 978                         } elsif (defined $params{'hash_parent'}) {
 979                                 $href .= esc_url($params{'hash_parent'}). "..";
 980                                 delete $params{'hash_parent'};
 981                         }
 982
 983                         $href .= esc_url($params{'hash_base'});
 984                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 985                                 $href .= ":/".esc_url($params{'file_name'});
 986                                 delete $params{'file_name'};
 987                         }
 988                         delete $params{'hash'};
 989                         delete $params{'hash_base'};
 990                 } elsif (defined $params{'hash'}) {
 991                         $href .= esc_url($params{'hash'});
 992                         delete $params{'hash'};
 993                 }
 994
 995                 # If the action was a snapshot, we can absorb the
 996                 # snapshot_format parameter too
 997                 if ($is_snapshot) {
 998                         my $fmt = $params{'snapshot_format'};
 999                         # snapshot_format should always be defined when href()
1000                         # is called, but just in case some code forgets, we
1001                         # fall back to the default
1002                         $fmt ||= $snapshot_fmts[0];
1003                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1004                         delete $params{'snapshot_format'};
1005                 }
1006         }
1007
1008         # now encode the parameters explicitly
1009         my @result = ();
1010         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1011                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1012                 if (defined $params{$name}) {
1013                         if (ref($params{$name}) eq "ARRAY") {
1014                                 foreach my $par (@{$params{$name}}) {
1015                                         push @result, $symbol . "=" . esc_param($par);
1016                                 }
1017                         } else {
1018                                 push @result, $symbol . "=" . esc_param($params{$name});
1019                         }
1020                 }
1021         }
1022         $href .= "?" . join(';', @result) if scalar @result;
1023
1024         return $href;
1025 }
1026
1027
1028 ## ======================================================================
1029 ## validation, quoting/unquoting and escaping
1030
1031 sub validate_action {
1032         my $input = shift || return undef;
1033         return undef unless exists $actions{$input};
1034         return $input;
1035 }
1036
1037 sub validate_project {
1038         my $input = shift || return undef;
1039         if (!validate_pathname($input) ||
1040                 !(-d "$projectroot/$input") ||
1041                 !check_export_ok("$projectroot/$input") ||
1042                 ($strict_export && !project_in_list($input))) {
1043                 return undef;
1044         } else {
1045                 return $input;
1046         }
1047 }
1048
1049 sub validate_pathname {
1050         my $input = shift || return undef;
1051
1052         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1053         # at the beginning, at the end, and between slashes.
1054         # also this catches doubled slashes
1055         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1056                 return undef;
1057         }
1058         # no null characters
1059         if ($input =~ m!\0!) {
1060                 return undef;
1061         }
1062         return $input;
1063 }
1064
1065 sub validate_refname {
1066         my $input = shift || return undef;
1067
1068         # textual hashes are O.K.
1069         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1070                 return $input;
1071         }
1072         # it must be correct pathname
1073         $input = validate_pathname($input)
1074                 or return undef;
1075         # restrictions on ref name according to git-check-ref-format
1076         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1077                 return undef;
1078         }
1079         return $input;
1080 }
1081
1082 # decode sequences of octets in utf8 into Perl's internal form,
1083 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1084 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1085 sub to_utf8 {
1086         my $str = shift;
1087         if (utf8::valid($str)) {
1088                 utf8::decode($str);
1089                 return $str;
1090         } else {
1091                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1092         }
1093 }
1094
1095 # quote unsafe chars, but keep the slash, even when it's not
1096 # correct, but quoted slashes look too horrible in bookmarks
1097 sub esc_param {
1098         my $str = shift;
1099         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1100         $str =~ s/ /\+/g;
1101         return $str;
1102 }
1103
1104 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1105 sub esc_url {
1106         my $str = shift;
1107         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1108         $str =~ s/\+/%2B/g;
1109         $str =~ s/ /\+/g;
1110         return $str;
1111 }
1112
1113 # replace invalid utf8 character with SUBSTITUTION sequence
1114 sub esc_html {
1115         my $str = shift;
1116         my %opts = @_;
1117
1118         $str = to_utf8($str);
1119         $str = $cgi->escapeHTML($str);
1120         if ($opts{'-nbsp'}) {
1121                 $str =~ s/ /&nbsp;/g;
1122         }
1123         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1124         return $str;
1125 }
1126
1127 # quote control characters and escape filename to HTML
1128 sub esc_path {
1129         my $str = shift;
1130         my %opts = @_;
1131
1132         $str = to_utf8($str);
1133         $str = $cgi->escapeHTML($str);
1134         if ($opts{'-nbsp'}) {
1135                 $str =~ s/ /&nbsp;/g;
1136         }
1137         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1138         return $str;
1139 }
1140
1141 # Make control characters "printable", using character escape codes (CEC)
1142 sub quot_cec {
1143         my $cntrl = shift;
1144         my %opts = @_;
1145         my %es = ( # character escape codes, aka escape sequences
1146                 "\t" => '\t',   # tab            (HT)
1147                 "\n" => '\n',   # line feed      (LF)
1148                 "\r" => '\r',   # carrige return (CR)
1149                 "\f" => '\f',   # form feed      (FF)
1150                 "\b" => '\b',   # backspace      (BS)
1151                 "\a" => '\a',   # alarm (bell)   (BEL)
1152                 "\e" => '\e',   # escape         (ESC)
1153                 "\013" => '\v', # vertical tab   (VT)
1154                 "\000" => '\0', # nul character  (NUL)
1155         );
1156         my $chr = ( (exists $es{$cntrl})
1157                     ? $es{$cntrl}
1158                     : sprintf('\%2x', ord($cntrl)) );
1159         if ($opts{-nohtml}) {
1160                 return $chr;
1161         } else {
1162                 return "<span class=\"cntrl\">$chr</span>";
1163         }
1164 }
1165
1166 # Alternatively use unicode control pictures codepoints,
1167 # Unicode "printable representation" (PR)
1168 sub quot_upr {
1169         my $cntrl = shift;
1170         my %opts = @_;
1171
1172         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1173         if ($opts{-nohtml}) {
1174                 return $chr;
1175         } else {
1176                 return "<span class=\"cntrl\">$chr</span>";
1177         }
1178 }
1179
1180 # git may return quoted and escaped filenames
1181 sub unquote {
1182         my $str = shift;
1183
1184         sub unq {
1185                 my $seq = shift;
1186                 my %es = ( # character escape codes, aka escape sequences
1187                         't' => "\t",   # tab            (HT, TAB)
1188                         'n' => "\n",   # newline        (NL)
1189                         'r' => "\r",   # return         (CR)
1190                         'f' => "\f",   # form feed      (FF)
1191                         'b' => "\b",   # backspace      (BS)
1192                         'a' => "\a",   # alarm (bell)   (BEL)
1193                         'e' => "\e",   # escape         (ESC)
1194                         'v' => "\013", # vertical tab   (VT)
1195                 );
1196
1197                 if ($seq =~ m/^[0-7]{1,3}$/) {
1198                         # octal char sequence
1199                         return chr(oct($seq));
1200                 } elsif (exists $es{$seq}) {
1201                         # C escape sequence, aka character escape code
1202                         return $es{$seq};
1203                 }
1204                 # quoted ordinary character
1205                 return $seq;
1206         }
1207
1208         if ($str =~ m/^"(.*)"$/) {
1209                 # needs unquoting
1210                 $str = $1;
1211                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1212         }
1213         return $str;
1214 }
1215
1216 # escape tabs (convert tabs to spaces)
1217 sub untabify {
1218         my $line = shift;
1219
1220         while ((my $pos = index($line, "\t")) != -1) {
1221                 if (my $count = (8 - ($pos % 8))) {
1222                         my $spaces = ' ' x $count;
1223                         $line =~ s/\t/$spaces/;
1224                 }
1225         }
1226
1227         return $line;
1228 }
1229
1230 sub project_in_list {
1231         my $project = shift;
1232         my @list = git_get_projects_list();
1233         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1234 }
1235
1236 ## ----------------------------------------------------------------------
1237 ## HTML aware string manipulation
1238
1239 # Try to chop given string on a word boundary between position
1240 # $len and $len+$add_len. If there is no word boundary there,
1241 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1242 # (marking chopped part) would be longer than given string.
1243 sub chop_str {
1244         my $str = shift;
1245         my $len = shift;
1246         my $add_len = shift || 10;
1247         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1248
1249         # Make sure perl knows it is utf8 encoded so we don't
1250         # cut in the middle of a utf8 multibyte char.
1251         $str = to_utf8($str);
1252
1253         # allow only $len chars, but don't cut a word if it would fit in $add_len
1254         # if it doesn't fit, cut it if it's still longer than the dots we would add
1255         # remove chopped character entities entirely
1256
1257         # when chopping in the middle, distribute $len into left and right part
1258         # return early if chopping wouldn't make string shorter
1259         if ($where eq 'center') {
1260                 return $str if ($len + 5 >= length($str)); # filler is length 5
1261                 $len = int($len/2);
1262         } else {
1263                 return $str if ($len + 4 >= length($str)); # filler is length 4
1264         }
1265
1266         # regexps: ending and beginning with word part up to $add_len
1267         my $endre = qr/.{$len}\w{0,$add_len}/;
1268         my $begre = qr/\w{0,$add_len}.{$len}/;
1269
1270         if ($where eq 'left') {
1271                 $str =~ m/^(.*?)($begre)$/;
1272                 my ($lead, $body) = ($1, $2);
1273                 if (length($lead) > 4) {
1274                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1275                         $lead = " ...";
1276                 }
1277                 return "$lead$body";
1278
1279         } elsif ($where eq 'center') {
1280                 $str =~ m/^($endre)(.*)$/;
1281                 my ($left, $str)  = ($1, $2);
1282                 $str =~ m/^(.*?)($begre)$/;
1283                 my ($mid, $right) = ($1, $2);
1284                 if (length($mid) > 5) {
1285                         $left  =~ s/&[^;]*$//;
1286                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1287                         $mid = " ... ";
1288                 }
1289                 return "$left$mid$right";
1290
1291         } else {
1292                 $str =~ m/^($endre)(.*)$/;
1293                 my $body = $1;
1294                 my $tail = $2;
1295                 if (length($tail) > 4) {
1296                         $body =~ s/&[^;]*$//;
1297                         $tail = "... ";
1298                 }
1299                 return "$body$tail";
1300         }
1301 }
1302
1303 # takes the same arguments as chop_str, but also wraps a <span> around the
1304 # result with a title attribute if it does get chopped. Additionally, the
1305 # string is HTML-escaped.
1306 sub chop_and_escape_str {
1307         my ($str) = @_;
1308
1309         my $chopped = chop_str(@_);
1310         if ($chopped eq $str) {
1311                 return esc_html($chopped);
1312         } else {
1313                 $str =~ s/[[:cntrl:]]/?/g;
1314                 return $cgi->span({-title=>$str}, esc_html($chopped));
1315         }
1316 }
1317
1318 ## ----------------------------------------------------------------------
1319 ## functions returning short strings
1320
1321 # CSS class for given age value (in seconds)
1322 sub age_class {
1323         my $age = shift;
1324
1325         if (!defined $age) {
1326                 return "noage";
1327         } elsif ($age < 60*60*2) {
1328                 return "age0";
1329         } elsif ($age < 60*60*24*2) {
1330                 return "age1";
1331         } else {
1332                 return "age2";
1333         }
1334 }
1335
1336 # convert age in seconds to "nn units ago" string
1337 sub age_string {
1338         my $age = shift;
1339         my $age_str;
1340
1341         if ($age > 60*60*24*365*2) {
1342                 $age_str = (int $age/60/60/24/365);
1343                 $age_str .= " years ago";
1344         } elsif ($age > 60*60*24*(365/12)*2) {
1345                 $age_str = int $age/60/60/24/(365/12);
1346                 $age_str .= " months ago";
1347         } elsif ($age > 60*60*24*7*2) {
1348                 $age_str = int $age/60/60/24/7;
1349                 $age_str .= " weeks ago";
1350         } elsif ($age > 60*60*24*2) {
1351                 $age_str = int $age/60/60/24;
1352                 $age_str .= " days ago";
1353         } elsif ($age > 60*60*2) {
1354                 $age_str = int $age/60/60;
1355                 $age_str .= " hours ago";
1356         } elsif ($age > 60*2) {
1357                 $age_str = int $age/60;
1358                 $age_str .= " min ago";
1359         } elsif ($age > 2) {
1360                 $age_str = int $age;
1361                 $age_str .= " sec ago";
1362         } else {
1363                 $age_str .= " right now";
1364         }
1365         return $age_str;
1366 }
1367
1368 use constant {
1369         S_IFINVALID => 0030000,
1370         S_IFGITLINK => 0160000,
1371 };
1372
1373 # submodule/subproject, a commit object reference
1374 sub S_ISGITLINK {
1375         my $mode = shift;
1376
1377         return (($mode & S_IFMT) == S_IFGITLINK)
1378 }
1379
1380 # convert file mode in octal to symbolic file mode string
1381 sub mode_str {
1382         my $mode = oct shift;
1383
1384         if (S_ISGITLINK($mode)) {
1385                 return 'm---------';
1386         } elsif (S_ISDIR($mode & S_IFMT)) {
1387                 return 'drwxr-xr-x';
1388         } elsif (S_ISLNK($mode)) {
1389                 return 'lrwxrwxrwx';
1390         } elsif (S_ISREG($mode)) {
1391                 # git cares only about the executable bit
1392                 if ($mode & S_IXUSR) {
1393                         return '-rwxr-xr-x';
1394                 } else {
1395                         return '-rw-r--r--';
1396                 };
1397         } else {
1398                 return '----------';
1399         }
1400 }
1401
1402 # convert file mode in octal to file type string
1403 sub file_type {
1404         my $mode = shift;
1405
1406         if ($mode !~ m/^[0-7]+$/) {
1407                 return $mode;
1408         } else {
1409                 $mode = oct $mode;
1410         }
1411
1412         if (S_ISGITLINK($mode)) {
1413                 return "submodule";
1414         } elsif (S_ISDIR($mode & S_IFMT)) {
1415                 return "directory";
1416         } elsif (S_ISLNK($mode)) {
1417                 return "symlink";
1418         } elsif (S_ISREG($mode)) {
1419                 return "file";
1420         } else {
1421                 return "unknown";
1422         }
1423 }
1424
1425 # convert file mode in octal to file type description string
1426 sub file_type_long {
1427         my $mode = shift;
1428
1429         if ($mode !~ m/^[0-7]+$/) {
1430                 return $mode;
1431         } else {
1432                 $mode = oct $mode;
1433         }
1434
1435         if (S_ISGITLINK($mode)) {
1436                 return "submodule";
1437         } elsif (S_ISDIR($mode & S_IFMT)) {
1438                 return "directory";
1439         } elsif (S_ISLNK($mode)) {
1440                 return "symlink";
1441         } elsif (S_ISREG($mode)) {
1442                 if ($mode & S_IXUSR) {
1443                         return "executable";
1444                 } else {
1445                         return "file";
1446                 };
1447         } else {
1448                 return "unknown";
1449         }
1450 }
1451
1452
1453 ## ----------------------------------------------------------------------
1454 ## functions returning short HTML fragments, or transforming HTML fragments
1455 ## which don't belong to other sections
1456
1457 # format line of commit message.
1458 sub format_log_line_html {
1459         my $line = shift;
1460
1461         $line = esc_html($line, -nbsp=>1);
1462         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1463                 $cgi->a({-href => href(action=>"object", hash=>$1),
1464                                         -class => "text"}, $1);
1465         }eg;
1466
1467         return $line;
1468 }
1469
1470 # format marker of refs pointing to given object
1471
1472 # the destination action is chosen based on object type and current context:
1473 # - for annotated tags, we choose the tag view unless it's the current view
1474 #   already, in which case we go to shortlog view
1475 # - for other refs, we keep the current view if we're in history, shortlog or
1476 #   log view, and select shortlog otherwise
1477 sub format_ref_marker {
1478         my ($refs, $id) = @_;
1479         my $markers = '';
1480
1481         if (defined $refs->{$id}) {
1482                 foreach my $ref (@{$refs->{$id}}) {
1483                         # this code exploits the fact that non-lightweight tags are the
1484                         # only indirect objects, and that they are the only objects for which
1485                         # we want to use tag instead of shortlog as action
1486                         my ($type, $name) = qw();
1487                         my $indirect = ($ref =~ s/\^\{\}$//);
1488                         # e.g. tags/v2.6.11 or heads/next
1489                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1490                                 $type = $1;
1491                                 $name = $2;
1492                         } else {
1493                                 $type = "ref";
1494                                 $name = $ref;
1495                         }
1496
1497                         my $class = $type;
1498                         $class .= " indirect" if $indirect;
1499
1500                         my $dest_action = "shortlog";
1501
1502                         if ($indirect) {
1503                                 $dest_action = "tag" unless $action eq "tag";
1504                         } elsif ($action =~ /^(history|(short)?log)$/) {
1505                                 $dest_action = $action;
1506                         }
1507
1508                         my $dest = "";
1509                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1510                         $dest .= $ref;
1511
1512                         my $link = $cgi->a({
1513                                 -href => href(
1514                                         action=>$dest_action,
1515                                         hash=>$dest
1516                                 )}, $name);
1517
1518                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1519                                 $link . "</span>";
1520                 }
1521         }
1522
1523         if ($markers) {
1524                 return ' <span class="refs">'. $markers . '</span>';
1525         } else {
1526                 return "";
1527         }
1528 }
1529
1530 # format, perhaps shortened and with markers, title line
1531 sub format_subject_html {
1532         my ($long, $short, $href, $extra) = @_;
1533         $extra = '' unless defined($extra);
1534
1535         if (length($short) < length($long)) {
1536                 $long =~ s/[[:cntrl:]]/?/g;
1537                 return $cgi->a({-href => $href, -class => "list subject",
1538                                 -title => to_utf8($long)},
1539                        esc_html($short)) . $extra;
1540         } else {
1541                 return $cgi->a({-href => $href, -class => "list subject"},
1542                        esc_html($long)) . $extra;
1543         }
1544 }
1545
1546 # Rather than recomputing the url for an email multiple times, we cache it
1547 # after the first hit. This gives a visible benefit in views where the avatar
1548 # for the same email is used repeatedly (e.g. shortlog).
1549 # The cache is shared by all avatar engines (currently gravatar only), which
1550 # are free to use it as preferred. Since only one avatar engine is used for any
1551 # given page, there's no risk for cache conflicts.
1552 our %avatar_cache = ();
1553
1554 # Compute the picon url for a given email, by using the picon search service over at
1555 # http://www.cs.indiana.edu/picons/search.html
1556 sub picon_url {
1557         my $email = lc shift;
1558         if (!$avatar_cache{$email}) {
1559                 my ($user, $domain) = split('@', $email);
1560                 $avatar_cache{$email} =
1561                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1562                         "$domain/$user/" .
1563                         "users+domains+unknown/up/single";
1564         }
1565         return $avatar_cache{$email};
1566 }
1567
1568 # Compute the gravatar url for a given email, if it's not in the cache already.
1569 # Gravatar stores only the part of the URL before the size, since that's the
1570 # one computationally more expensive. This also allows reuse of the cache for
1571 # different sizes (for this particular engine).
1572 sub gravatar_url {
1573         my $email = lc shift;
1574         my $size = shift;
1575         $avatar_cache{$email} ||=
1576                 "http://www.gravatar.com/avatar/" .
1577                         Digest::MD5::md5_hex($email) . "?s=";
1578         return $avatar_cache{$email} . $size;
1579 }
1580
1581 # Insert an avatar for the given $email at the given $size if the feature
1582 # is enabled.
1583 sub git_get_avatar {
1584         my ($email, %opts) = @_;
1585         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1586         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1587         $opts{-size} ||= 'default';
1588         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1589         my $url = "";
1590         if ($git_avatar eq 'gravatar') {
1591                 $url = gravatar_url($email, $size);
1592         } elsif ($git_avatar eq 'picon') {
1593                 $url = picon_url($email);
1594         }
1595         # Other providers can be added by extending the if chain, defining $url
1596         # as needed. If no variant puts something in $url, we assume avatars
1597         # are completely disabled/unavailable.
1598         if ($url) {
1599                 return $pre_white .
1600                        "<img width=\"$size\" " .
1601                             "class=\"avatar\" " .
1602                             "src=\"$url\" " .
1603                             "alt=\"\" " .
1604                        "/>" . $post_white;
1605         } else {
1606                 return "";
1607         }
1608 }
1609
1610 sub format_search_author {
1611         my ($author, $searchtype, $displaytext) = @_;
1612         my $have_search = gitweb_check_feature('search');
1613
1614         if ($have_search) {
1615                 my $performed = "";
1616                 if ($searchtype eq 'author') {
1617                         $performed = "authored";
1618                 } elsif ($searchtype eq 'committer') {
1619                         $performed = "committed";
1620                 }
1621
1622                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1623                                 searchtext=>$author,
1624                                 searchtype=>$searchtype), class=>"list",
1625                                 title=>"Search for commits $performed by $author"},
1626                                 $displaytext);
1627
1628         } else {
1629                 return $displaytext;
1630         }
1631 }
1632
1633 # format the author name of the given commit with the given tag
1634 # the author name is chopped and escaped according to the other
1635 # optional parameters (see chop_str).
1636 sub format_author_html {
1637         my $tag = shift;
1638         my $co = shift;
1639         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1640         return "<$tag class=\"author\">" .
1641                format_search_author($co->{'author_name'}, "author",
1642                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1643                        $author) .
1644                "</$tag>";
1645 }
1646
1647 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1648 sub format_git_diff_header_line {
1649         my $line = shift;
1650         my $diffinfo = shift;
1651         my ($from, $to) = @_;
1652
1653         if ($diffinfo->{'nparents'}) {
1654                 # combined diff
1655                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1656                 if ($to->{'href'}) {
1657                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1658                                          esc_path($to->{'file'}));
1659                 } else { # file was deleted (no href)
1660                         $line .= esc_path($to->{'file'});
1661                 }
1662         } else {
1663                 # "ordinary" diff
1664                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1665                 if ($from->{'href'}) {
1666                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1667                                          'a/' . esc_path($from->{'file'}));
1668                 } else { # file was added (no href)
1669                         $line .= 'a/' . esc_path($from->{'file'});
1670                 }
1671                 $line .= ' ';
1672                 if ($to->{'href'}) {
1673                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1674                                          'b/' . esc_path($to->{'file'}));
1675                 } else { # file was deleted
1676                         $line .= 'b/' . esc_path($to->{'file'});
1677                 }
1678         }
1679
1680         return "<div class=\"diff header\">$line</div>\n";
1681 }
1682
1683 # format extended diff header line, before patch itself
1684 sub format_extended_diff_header_line {
1685         my $line = shift;
1686         my $diffinfo = shift;
1687         my ($from, $to) = @_;
1688
1689         # match <path>
1690         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1691                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1692                                        esc_path($from->{'file'}));
1693         }
1694         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1695                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1696                                  esc_path($to->{'file'}));
1697         }
1698         # match single <mode>
1699         if ($line =~ m/\s(\d{6})$/) {
1700                 $line .= '<span class="info"> (' .
1701                          file_type_long($1) .
1702                          ')</span>';
1703         }
1704         # match <hash>
1705         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1706                 # can match only for combined diff
1707                 $line = 'index ';
1708                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1709                         if ($from->{'href'}[$i]) {
1710                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1711                                                   -class=>"hash"},
1712                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1713                         } else {
1714                                 $line .= '0' x 7;
1715                         }
1716                         # separator
1717                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1718                 }
1719                 $line .= '..';
1720                 if ($to->{'href'}) {
1721                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1722                                          substr($diffinfo->{'to_id'},0,7));
1723                 } else {
1724                         $line .= '0' x 7;
1725                 }
1726
1727         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1728                 # can match only for ordinary diff
1729                 my ($from_link, $to_link);
1730                 if ($from->{'href'}) {
1731                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1732                                              substr($diffinfo->{'from_id'},0,7));
1733                 } else {
1734                         $from_link = '0' x 7;
1735                 }
1736                 if ($to->{'href'}) {
1737                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1738                                            substr($diffinfo->{'to_id'},0,7));
1739                 } else {
1740                         $to_link = '0' x 7;
1741                 }
1742                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1743                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1744         }
1745
1746         return $line . "<br/>\n";
1747 }
1748
1749 # format from-file/to-file diff header
1750 sub format_diff_from_to_header {
1751         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1752         my $line;
1753         my $result = '';
1754
1755         $line = $from_line;
1756         #assert($line =~ m/^---/) if DEBUG;
1757         # no extra formatting for "^--- /dev/null"
1758         if (! $diffinfo->{'nparents'}) {
1759                 # ordinary (single parent) diff
1760                 if ($line =~ m!^--- "?a/!) {
1761                         if ($from->{'href'}) {
1762                                 $line = '--- a/' .
1763                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1764                                                 esc_path($from->{'file'}));
1765                         } else {
1766                                 $line = '--- a/' .
1767                                         esc_path($from->{'file'});
1768                         }
1769                 }
1770                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1771
1772         } else {
1773                 # combined diff (merge commit)
1774                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1775                         if ($from->{'href'}[$i]) {
1776                                 $line = '--- ' .
1777                                         $cgi->a({-href=>href(action=>"blobdiff",
1778                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1779                                                              hash_parent_base=>$parents[$i],
1780                                                              file_parent=>$from->{'file'}[$i],
1781                                                              hash=>$diffinfo->{'to_id'},
1782                                                              hash_base=>$hash,
1783                                                              file_name=>$to->{'file'}),
1784                                                  -class=>"path",
1785                                                  -title=>"diff" . ($i+1)},
1786                                                 $i+1) .
1787                                         '/' .
1788                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1789                                                 esc_path($from->{'file'}[$i]));
1790                         } else {
1791                                 $line = '--- /dev/null';
1792                         }
1793                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1794                 }
1795         }
1796
1797         $line = $to_line;
1798         #assert($line =~ m/^\+\+\+/) if DEBUG;
1799         # no extra formatting for "^+++ /dev/null"
1800         if ($line =~ m!^\+\+\+ "?b/!) {
1801                 if ($to->{'href'}) {
1802                         $line = '+++ b/' .
1803                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1804                                         esc_path($to->{'file'}));
1805                 } else {
1806                         $line = '+++ b/' .
1807                                 esc_path($to->{'file'});
1808                 }
1809         }
1810         $result .= qq!<div class="diff to_file">$line</div>\n!;
1811
1812         return $result;
1813 }
1814
1815 # create note for patch simplified by combined diff
1816 sub format_diff_cc_simplified {
1817         my ($diffinfo, @parents) = @_;
1818         my $result = '';
1819
1820         $result .= "<div class=\"diff header\">" .
1821                    "diff --cc ";
1822         if (!is_deleted($diffinfo)) {
1823                 $result .= $cgi->a({-href => href(action=>"blob",
1824                                                   hash_base=>$hash,
1825                                                   hash=>$diffinfo->{'to_id'},
1826                                                   file_name=>$diffinfo->{'to_file'}),
1827                                     -class => "path"},
1828                                    esc_path($diffinfo->{'to_file'}));
1829         } else {
1830                 $result .= esc_path($diffinfo->{'to_file'});
1831         }
1832         $result .= "</div>\n" . # class="diff header"
1833                    "<div class=\"diff nodifferences\">" .
1834                    "Simple merge" .
1835                    "</div>\n"; # class="diff nodifferences"
1836
1837         return $result;
1838 }
1839
1840 # format patch (diff) line (not to be used for diff headers)
1841 sub format_diff_line {
1842         my $line = shift;
1843         my ($from, $to) = @_;
1844         my $diff_class = "";
1845
1846         chomp $line;
1847
1848         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1849                 # combined diff
1850                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1851                 if ($line =~ m/^\@{3}/) {
1852                         $diff_class = " chunk_header";
1853                 } elsif ($line =~ m/^\\/) {
1854                         $diff_class = " incomplete";
1855                 } elsif ($prefix =~ tr/+/+/) {
1856                         $diff_class = " add";
1857                 } elsif ($prefix =~ tr/-/-/) {
1858                         $diff_class = " rem";
1859                 }
1860         } else {
1861                 # assume ordinary diff
1862                 my $char = substr($line, 0, 1);
1863                 if ($char eq '+') {
1864                         $diff_class = " add";
1865                 } elsif ($char eq '-') {
1866                         $diff_class = " rem";
1867                 } elsif ($char eq '@') {
1868                         $diff_class = " chunk_header";
1869                 } elsif ($char eq "\\") {
1870                         $diff_class = " incomplete";
1871                 }
1872         }
1873         $line = untabify($line);
1874         if ($from && $to && $line =~ m/^\@{2} /) {
1875                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1876                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1877
1878                 $from_lines = 0 unless defined $from_lines;
1879                 $to_lines   = 0 unless defined $to_lines;
1880
1881                 if ($from->{'href'}) {
1882                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1883                                              -class=>"list"}, $from_text);
1884                 }
1885                 if ($to->{'href'}) {
1886                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1887                                              -class=>"list"}, $to_text);
1888                 }
1889                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1890                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1891                 return "<div class=\"diff$diff_class\">$line</div>\n";
1892         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1893                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1894                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1895
1896                 @from_text = split(' ', $ranges);
1897                 for (my $i = 0; $i < @from_text; ++$i) {
1898                         ($from_start[$i], $from_nlines[$i]) =
1899                                 (split(',', substr($from_text[$i], 1)), 0);
1900                 }
1901
1902                 $to_text   = pop @from_text;
1903                 $to_start  = pop @from_start;
1904                 $to_nlines = pop @from_nlines;
1905
1906                 $line = "<span class=\"chunk_info\">$prefix ";
1907                 for (my $i = 0; $i < @from_text; ++$i) {
1908                         if ($from->{'href'}[$i]) {
1909                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1910                                                   -class=>"list"}, $from_text[$i]);
1911                         } else {
1912                                 $line .= $from_text[$i];
1913                         }
1914                         $line .= " ";
1915                 }
1916                 if ($to->{'href'}) {
1917                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1918                                           -class=>"list"}, $to_text);
1919                 } else {
1920                         $line .= $to_text;
1921                 }
1922                 $line .= " $prefix</span>" .
1923                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1924                 return "<div class=\"diff$diff_class\">$line</div>\n";
1925         }
1926         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1927 }
1928
1929 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1930 # linked.  Pass the hash of the tree/commit to snapshot.
1931 sub format_snapshot_links {
1932         my ($hash) = @_;
1933         my $num_fmts = @snapshot_fmts;
1934         if ($num_fmts > 1) {
1935                 # A parenthesized list of links bearing format names.
1936                 # e.g. "snapshot (_tar.gz_ _zip_)"
1937                 return "snapshot (" . join(' ', map
1938                         $cgi->a({
1939                                 -href => href(
1940                                         action=>"snapshot",
1941                                         hash=>$hash,
1942                                         snapshot_format=>$_
1943                                 )
1944                         }, $known_snapshot_formats{$_}{'display'})
1945                 , @snapshot_fmts) . ")";
1946         } elsif ($num_fmts == 1) {
1947                 # A single "snapshot" link whose tooltip bears the format name.
1948                 # i.e. "_snapshot_"
1949                 my ($fmt) = @snapshot_fmts;
1950                 return
1951                         $cgi->a({
1952                                 -href => href(
1953                                         action=>"snapshot",
1954                                         hash=>$hash,
1955                                         snapshot_format=>$fmt
1956                                 ),
1957                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1958                         }, "snapshot");
1959         } else { # $num_fmts == 0
1960                 return undef;
1961         }
1962 }
1963
1964 ## ......................................................................
1965 ## functions returning values to be passed, perhaps after some
1966 ## transformation, to other functions; e.g. returning arguments to href()
1967
1968 # returns hash to be passed to href to generate gitweb URL
1969 # in -title key it returns description of link
1970 sub get_feed_info {
1971         my $format = shift || 'Atom';
1972         my %res = (action => lc($format));
1973
1974         # feed links are possible only for project views
1975         return unless (defined $project);
1976         # some views should link to OPML, or to generic project feed,
1977         # or don't have specific feed yet (so they should use generic)
1978         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1979
1980         my $branch;
1981         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1982         # from tag links; this also makes possible to detect branch links
1983         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1984             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1985                 $branch = $1;
1986         }
1987         # find log type for feed description (title)
1988         my $type = 'log';
1989         if (defined $file_name) {
1990                 $type  = "history of $file_name";
1991                 $type .= "/" if ($action eq 'tree');
1992                 $type .= " on '$branch'" if (defined $branch);
1993         } else {
1994                 $type = "log of $branch" if (defined $branch);
1995         }
1996
1997         $res{-title} = $type;
1998         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1999         $res{'file_name'} = $file_name;
2000
2001         return %res;
2002 }
2003
2004 ## ----------------------------------------------------------------------
2005 ## git utility subroutines, invoking git commands
2006
2007 # returns path to the core git executable and the --git-dir parameter as list
2008 sub git_cmd {
2009         return $GIT, '--git-dir='.$git_dir;
2010 }
2011
2012 # quote the given arguments for passing them to the shell
2013 # quote_command("command", "arg 1", "arg with ' and ! characters")
2014 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2015 # Try to avoid using this function wherever possible.
2016 sub quote_command {
2017         return join(' ',
2018                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2019 }
2020
2021 # get HEAD ref of given project as hash
2022 sub git_get_head_hash {
2023         my $project = shift;
2024         my $o_git_dir = $git_dir;
2025         my $retval = undef;
2026         $git_dir = "$projectroot/$project";
2027         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
2028                 my $head = <$fd>;
2029                 close $fd;
2030                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
2031                         $retval = $1;
2032                 }
2033         }
2034         if (defined $o_git_dir) {
2035                 $git_dir = $o_git_dir;
2036         }
2037         return $retval;
2038 }
2039
2040 # get type of given object
2041 sub git_get_type {
2042         my $hash = shift;
2043
2044         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2045         my $type = <$fd>;
2046         close $fd or return;
2047         chomp $type;
2048         return $type;
2049 }
2050
2051 # repository configuration
2052 our $config_file = '';
2053 our %config;
2054
2055 # store multiple values for single key as anonymous array reference
2056 # single values stored directly in the hash, not as [ <value> ]
2057 sub hash_set_multi {
2058         my ($hash, $key, $value) = @_;
2059
2060         if (!exists $hash->{$key}) {
2061                 $hash->{$key} = $value;
2062         } elsif (!ref $hash->{$key}) {
2063                 $hash->{$key} = [ $hash->{$key}, $value ];
2064         } else {
2065                 push @{$hash->{$key}}, $value;
2066         }
2067 }
2068
2069 # return hash of git project configuration
2070 # optionally limited to some section, e.g. 'gitweb'
2071 sub git_parse_project_config {
2072         my $section_regexp = shift;
2073         my %config;
2074
2075         local $/ = "\0";
2076
2077         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2078                 or return;
2079
2080         while (my $keyval = <$fh>) {
2081                 chomp $keyval;
2082                 my ($key, $value) = split(/\n/, $keyval, 2);
2083
2084                 hash_set_multi(\%config, $key, $value)
2085                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2086         }
2087         close $fh;
2088
2089         return %config;
2090 }
2091
2092 # convert config value to boolean: 'true' or 'false'
2093 # no value, number > 0, 'true' and 'yes' values are true
2094 # rest of values are treated as false (never as error)
2095 sub config_to_bool {
2096         my $val = shift;
2097
2098         return 1 if !defined $val;             # section.key
2099
2100         # strip leading and trailing whitespace
2101         $val =~ s/^\s+//;
2102         $val =~ s/\s+$//;
2103
2104         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2105                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2106 }
2107
2108 # convert config value to simple decimal number
2109 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2110 # to be multiplied by 1024, 1048576, or 1073741824
2111 sub config_to_int {
2112         my $val = shift;
2113
2114         # strip leading and trailing whitespace
2115         $val =~ s/^\s+//;
2116         $val =~ s/\s+$//;
2117
2118         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2119                 $unit = lc($unit);
2120                 # unknown unit is treated as 1
2121                 return $num * ($unit eq 'g' ? 1073741824 :
2122                                $unit eq 'm' ?    1048576 :
2123                                $unit eq 'k' ?       1024 : 1);
2124         }
2125         return $val;
2126 }
2127
2128 # convert config value to array reference, if needed
2129 sub config_to_multi {
2130         my $val = shift;
2131
2132         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2133 }
2134
2135 sub git_get_project_config {
2136         my ($key, $type) = @_;
2137
2138         # key sanity check
2139         return unless ($key);
2140         $key =~ s/^gitweb\.//;
2141         return if ($key =~ m/\W/);
2142
2143         # type sanity check
2144         if (defined $type) {
2145                 $type =~ s/^--//;
2146                 $type = undef
2147                         unless ($type eq 'bool' || $type eq 'int');
2148         }
2149
2150         # get config
2151         if (!defined $config_file ||
2152             $config_file ne "$git_dir/config") {
2153                 %config = git_parse_project_config('gitweb');
2154                 $config_file = "$git_dir/config";
2155         }
2156
2157         # check if config variable (key) exists
2158         return unless exists $config{"gitweb.$key"};
2159
2160         # ensure given type
2161         if (!defined $type) {
2162                 return $config{"gitweb.$key"};
2163         } elsif ($type eq 'bool') {
2164                 # backward compatibility: 'git config --bool' returns true/false
2165                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2166         } elsif ($type eq 'int') {
2167                 return config_to_int($config{"gitweb.$key"});
2168         }
2169         return $config{"gitweb.$key"};
2170 }
2171
2172 # get hash of given path at given ref
2173 sub git_get_hash_by_path {
2174         my $base = shift;
2175         my $path = shift || return undef;
2176         my $type = shift;
2177
2178         $path =~ s,/+$,,;
2179
2180         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2181                 or die_error(500, "Open git-ls-tree failed");
2182         my $line = <$fd>;
2183         close $fd or return undef;
2184
2185         if (!defined $line) {
2186                 # there is no tree or hash given by $path at $base
2187                 return undef;
2188         }
2189
2190         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2191         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2192         if (defined $type && $type ne $2) {
2193                 # type doesn't match
2194                 return undef;
2195         }
2196         return $3;
2197 }
2198
2199 # get path of entry with given hash at given tree-ish (ref)
2200 # used to get 'from' filename for combined diff (merge commit) for renames
2201 sub git_get_path_by_hash {
2202         my $base = shift || return;
2203         my $hash = shift || return;
2204
2205         local $/ = "\0";
2206
2207         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2208                 or return undef;
2209         while (my $line = <$fd>) {
2210                 chomp $line;
2211
2212                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2213                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2214                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2215                         close $fd;
2216                         return $1;
2217                 }
2218         }
2219         close $fd;
2220         return undef;
2221 }
2222
2223 ## ......................................................................
2224 ## git utility functions, directly accessing git repository
2225
2226 sub git_get_project_description {
2227         my $path = shift;
2228
2229         $git_dir = "$projectroot/$path";
2230         open my $fd, '<', "$git_dir/description"
2231                 or return git_get_project_config('description');
2232         my $descr = <$fd>;
2233         close $fd;
2234         if (defined $descr) {
2235                 chomp $descr;
2236         }
2237         return $descr;
2238 }
2239
2240 sub git_get_project_ctags {
2241         my $path = shift;
2242         my $ctags = {};
2243
2244         $git_dir = "$projectroot/$path";
2245         opendir my $dh, "$git_dir/ctags"
2246                 or return $ctags;
2247         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2248                 open my $ct, '<', $_ or next;
2249                 my $val = <$ct>;
2250                 chomp $val;
2251                 close $ct;
2252                 my $ctag = $_; $ctag =~ s#.*/##;
2253                 $ctags->{$ctag} = $val;
2254         }
2255         closedir $dh;
2256         $ctags;
2257 }
2258
2259 sub git_populate_project_tagcloud {
2260         my $ctags = shift;
2261
2262         # First, merge different-cased tags; tags vote on casing
2263         my %ctags_lc;
2264         foreach (keys %$ctags) {
2265                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2266                 if (not $ctags_lc{lc $_}->{topcount}
2267                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2268                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2269                         $ctags_lc{lc $_}->{topname} = $_;
2270                 }
2271         }
2272
2273         my $cloud;
2274         if (eval { require HTML::TagCloud; 1; }) {
2275                 $cloud = HTML::TagCloud->new;
2276                 foreach (sort keys %ctags_lc) {
2277                         # Pad the title with spaces so that the cloud looks
2278                         # less crammed.
2279                         my $title = $ctags_lc{$_}->{topname};
2280                         $title =~ s/ /&nbsp;/g;
2281                         $title =~ s/^/&nbsp;/g;
2282                         $title =~ s/$/&nbsp;/g;
2283                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2284                 }
2285         } else {
2286                 $cloud = \%ctags_lc;
2287         }
2288         $cloud;
2289 }
2290
2291 sub git_show_project_tagcloud {
2292         my ($cloud, $count) = @_;
2293         print STDERR ref($cloud)."..\n";
2294         if (ref $cloud eq 'HTML::TagCloud') {
2295                 return $cloud->html_and_css($count);
2296         } else {
2297                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2298                 return '<p align="center">' . join (', ', map {
2299                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2300                 } splice(@tags, 0, $count)) . '</p>';
2301         }
2302 }
2303
2304 sub git_get_project_url_list {
2305         my $path = shift;
2306
2307         $git_dir = "$projectroot/$path";
2308         open my $fd, '<', "$git_dir/cloneurl"
2309                 or return wantarray ?
2310                 @{ config_to_multi(git_get_project_config('url')) } :
2311                    config_to_multi(git_get_project_config('url'));
2312         my @git_project_url_list = map { chomp; $_ } <$fd>;
2313         close $fd;
2314
2315         return wantarray ? @git_project_url_list : \@git_project_url_list;
2316 }
2317
2318 sub git_get_projects_list {
2319         my ($filter) = @_;
2320         my @list;
2321
2322         $filter ||= '';
2323         $filter =~ s/\.git$//;
2324
2325         my $check_forks = gitweb_check_feature('forks');
2326
2327         if (-d $projects_list) {
2328                 # search in directory
2329                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2330                 # remove the trailing "/"
2331                 $dir =~ s!/+$!!;
2332                 my $pfxlen = length("$dir");
2333                 my $pfxdepth = ($dir =~ tr!/!!);
2334
2335                 File::Find::find({
2336                         follow_fast => 1, # follow symbolic links
2337                         follow_skip => 2, # ignore duplicates
2338                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2339                         wanted => sub {
2340                                 # skip project-list toplevel, if we get it.
2341                                 return if (m!^[/.]$!);
2342                                 # only directories can be git repositories
2343                                 return unless (-d $_);
2344                                 # don't traverse too deep (Find is super slow on os x)
2345                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2346                                         $File::Find::prune = 1;
2347                                         return;
2348                                 }
2349
2350                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2351                                 # we check related file in $projectroot
2352                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2353                                 if (check_export_ok("$projectroot/$path")) {
2354                                         push @list, { path => $path };
2355                                         $File::Find::prune = 1;
2356                                 }
2357                         },
2358                 }, "$dir");
2359
2360         } elsif (-f $projects_list) {
2361                 # read from file(url-encoded):
2362                 # 'git%2Fgit.git Linus+Torvalds'
2363                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2364                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2365                 my %paths;
2366                 open my $fd, '<', $projects_list or return;
2367         PROJECT:
2368                 while (my $line = <$fd>) {
2369                         chomp $line;
2370                         my ($path, $owner) = split ' ', $line;
2371                         $path = unescape($path);
2372                         $owner = unescape($owner);
2373                         if (!defined $path) {
2374                                 next;
2375                         }
2376                         if ($filter ne '') {
2377                                 # looking for forks;
2378                                 my $pfx = substr($path, 0, length($filter));
2379                                 if ($pfx ne $filter) {
2380                                         next PROJECT;
2381                                 }
2382                                 my $sfx = substr($path, length($filter));
2383                                 if ($sfx !~ /^\/.*\.git$/) {
2384                                         next PROJECT;
2385                                 }
2386                         } elsif ($check_forks) {
2387                         PATH:
2388                                 foreach my $filter (keys %paths) {
2389                                         # looking for forks;
2390                                         my $pfx = substr($path, 0, length($filter));
2391                                         if ($pfx ne $filter) {
2392                                                 next PATH;
2393                                         }
2394                                         my $sfx = substr($path, length($filter));
2395                                         if ($sfx !~ /^\/.*\.git$/) {
2396                                                 next PATH;
2397                                         }
2398                                         # is a fork, don't include it in
2399                                         # the list
2400                                         next PROJECT;
2401                                 }
2402                         }
2403                         if (check_export_ok("$projectroot/$path")) {
2404                                 my $pr = {
2405                                         path => $path,
2406                                         owner => to_utf8($owner),
2407                                 };
2408                                 push @list, $pr;
2409                                 (my $forks_path = $path) =~ s/\.git$//;
2410                                 $paths{$forks_path}++;
2411                         }
2412                 }
2413                 close $fd;
2414         }
2415         return @list;
2416 }
2417
2418 our $gitweb_project_owner = undef;
2419 sub git_get_project_list_from_file {
2420
2421         return if (defined $gitweb_project_owner);
2422
2423         $gitweb_project_owner = {};
2424         # read from file (url-encoded):
2425         # 'git%2Fgit.git Linus+Torvalds'
2426         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2427         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2428         if (-f $projects_list) {
2429                 open(my $fd, '<', $projects_list);
2430                 while (my $line = <$fd>) {
2431                         chomp $line;
2432                         my ($pr, $ow) = split ' ', $line;
2433                         $pr = unescape($pr);
2434                         $ow = unescape($ow);
2435                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2436                 }
2437                 close $fd;
2438         }
2439 }
2440
2441 sub git_get_project_owner {
2442         my $project = shift;
2443         my $owner;
2444
2445         return undef unless $project;
2446         $git_dir = "$projectroot/$project";
2447
2448         if (!defined $gitweb_project_owner) {
2449                 git_get_project_list_from_file();
2450         }
2451
2452         if (exists $gitweb_project_owner->{$project}) {
2453                 $owner = $gitweb_project_owner->{$project};
2454         }
2455         if (!defined $owner){
2456                 $owner = git_get_project_config('owner');
2457         }
2458         if (!defined $owner) {
2459                 $owner = get_file_owner("$git_dir");
2460         }
2461
2462         return $owner;
2463 }
2464
2465 sub git_get_last_activity {
2466         my ($path) = @_;
2467         my $fd;
2468
2469         $git_dir = "$projectroot/$path";
2470         open($fd, "-|", git_cmd(), 'for-each-ref',
2471              '--format=%(committer)',
2472              '--sort=-committerdate',
2473              '--count=1',
2474              'refs/heads') or return;
2475         my $most_recent = <$fd>;
2476         close $fd or return;
2477         if (defined $most_recent &&
2478             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2479                 my $timestamp = $1;
2480                 my $age = time - $timestamp;
2481                 return ($age, age_string($age));
2482         }
2483         return (undef, undef);
2484 }
2485
2486 sub git_get_references {
2487         my $type = shift || "";
2488         my %refs;
2489         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2490         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2491         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2492                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2493                 or return;
2494
2495         while (my $line = <$fd>) {
2496                 chomp $line;
2497                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2498                         if (defined $refs{$1}) {
2499                                 push @{$refs{$1}}, $2;
2500                         } else {
2501                                 $refs{$1} = [ $2 ];
2502                         }
2503                 }
2504         }
2505         close $fd or return;
2506         return \%refs;
2507 }
2508
2509 sub git_get_rev_name_tags {
2510         my $hash = shift || return undef;
2511
2512         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2513                 or return;
2514         my $name_rev = <$fd>;
2515         close $fd;
2516
2517         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2518                 return $1;
2519         } else {
2520                 # catches also '$hash undefined' output
2521                 return undef;
2522         }
2523 }
2524
2525 ## ----------------------------------------------------------------------
2526 ## parse to hash functions
2527
2528 sub parse_date {
2529         my $epoch = shift;
2530         my $tz = shift || "-0000";
2531
2532         my %date;
2533         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2534         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2535         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2536         $date{'hour'} = $hour;
2537         $date{'minute'} = $min;
2538         $date{'mday'} = $mday;
2539         $date{'day'} = $days[$wday];
2540         $date{'month'} = $months[$mon];
2541         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2542                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2543         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2544                              $mday, $months[$mon], $hour ,$min;
2545         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2546                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2547
2548         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2549         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2550         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2551         $date{'hour_local'} = $hour;
2552         $date{'minute_local'} = $min;
2553         $date{'tz_local'} = $tz;
2554         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2555                                   1900+$year, $mon+1, $mday,
2556                                   $hour, $min, $sec, $tz);
2557         return %date;
2558 }
2559
2560 sub parse_tag {
2561         my $tag_id = shift;
2562         my %tag;
2563         my @comment;
2564
2565         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2566         $tag{'id'} = $tag_id;
2567         while (my $line = <$fd>) {
2568                 chomp $line;
2569                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2570                         $tag{'object'} = $1;
2571                 } elsif ($line =~ m/^type (.+)$/) {
2572                         $tag{'type'} = $1;
2573                 } elsif ($line =~ m/^tag (.+)$/) {
2574                         $tag{'name'} = $1;
2575                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2576                         $tag{'author'} = $1;
2577                         $tag{'author_epoch'} = $2;
2578                         $tag{'author_tz'} = $3;
2579                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2580                                 $tag{'author_name'}  = $1;
2581                                 $tag{'author_email'} = $2;
2582                         } else {
2583                                 $tag{'author_name'} = $tag{'author'};
2584                         }
2585                 } elsif ($line =~ m/--BEGIN/) {
2586                         push @comment, $line;
2587                         last;
2588                 } elsif ($line eq "") {
2589                         last;
2590                 }
2591         }
2592         push @comment, <$fd>;
2593         $tag{'comment'} = \@comment;
2594         close $fd or return;
2595         if (!defined $tag{'name'}) {
2596                 return
2597         };
2598         return %tag
2599 }
2600
2601 sub parse_commit_text {
2602         my ($commit_text, $withparents) = @_;
2603         my @commit_lines = split '\n', $commit_text;
2604         my %co;
2605
2606         pop @commit_lines; # Remove '\0'
2607
2608         if (! @commit_lines) {
2609                 return;
2610         }
2611
2612         my $header = shift @commit_lines;
2613         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2614                 return;
2615         }
2616         ($co{'id'}, my @parents) = split ' ', $header;
2617         while (my $line = shift @commit_lines) {
2618                 last if $line eq "\n";
2619                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2620                         $co{'tree'} = $1;
2621                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2622                         push @parents, $1;
2623                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2624                         $co{'author'} = to_utf8($1);
2625                         $co{'author_epoch'} = $2;
2626                         $co{'author_tz'} = $3;
2627                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2628                                 $co{'author_name'}  = $1;
2629                                 $co{'author_email'} = $2;
2630                         } else {
2631                                 $co{'author_name'} = $co{'author'};
2632                         }
2633                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2634                         $co{'committer'} = to_utf8($1);
2635                         $co{'committer_epoch'} = $2;
2636                         $co{'committer_tz'} = $3;
2637                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2638                                 $co{'committer_name'}  = $1;
2639                                 $co{'committer_email'} = $2;
2640                         } else {
2641                                 $co{'committer_name'} = $co{'committer'};
2642                         }
2643                 }
2644         }
2645         if (!defined $co{'tree'}) {
2646                 return;
2647         };
2648         $co{'parents'} = \@parents;
2649         $co{'parent'} = $parents[0];
2650
2651         foreach my $title (@commit_lines) {
2652                 $title =~ s/^    //;
2653                 if ($title ne "") {
2654                         $co{'title'} = chop_str($title, 80, 5);
2655                         # remove leading stuff of merges to make the interesting part visible
2656                         if (length($title) > 50) {
2657                                 $title =~ s/^Automatic //;
2658                                 $title =~ s/^merge (of|with) /Merge ... /i;
2659                                 if (length($title) > 50) {
2660                                         $title =~ s/(http|rsync):\/\///;
2661                                 }
2662                                 if (length($title) > 50) {
2663                                         $title =~ s/(master|www|rsync)\.//;
2664                                 }
2665                                 if (length($title) > 50) {
2666                                         $title =~ s/kernel.org:?//;
2667                                 }
2668                                 if (length($title) > 50) {
2669                                         $title =~ s/\/pub\/scm//;
2670                                 }
2671                         }
2672                         $co{'title_short'} = chop_str($title, 50, 5);
2673                         last;
2674                 }
2675         }
2676         if (! defined $co{'title'} || $co{'title'} eq "") {
2677                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2678         }
2679         # remove added spaces
2680         foreach my $line (@commit_lines) {
2681                 $line =~ s/^    //;
2682         }
2683         $co{'comment'} = \@commit_lines;
2684
2685         my $age = time - $co{'committer_epoch'};
2686         $co{'age'} = $age;
2687         $co{'age_string'} = age_string($age);
2688         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2689         if ($age > 60*60*24*7*2) {
2690                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2691                 $co{'age_string_age'} = $co{'age_string'};
2692         } else {
2693                 $co{'age_string_date'} = $co{'age_string'};
2694                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2695         }
2696         return %co;
2697 }
2698
2699 sub parse_commit {
2700         my ($commit_id) = @_;
2701         my %co;
2702
2703         local $/ = "\0";
2704
2705         open my $fd, "-|", git_cmd(), "rev-list",
2706                 "--parents",
2707                 "--header",
2708                 "--max-count=1",
2709                 $commit_id,
2710                 "--",
2711                 or die_error(500, "Open git-rev-list failed");
2712         %co = parse_commit_text(<$fd>, 1);
2713         close $fd;
2714
2715         return %co;
2716 }
2717
2718 sub parse_commits {
2719         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2720         my @cos;
2721
2722         $maxcount ||= 1;
2723         $skip ||= 0;
2724
2725         local $/ = "\0";
2726
2727         open my $fd, "-|", git_cmd(), "rev-list",
2728                 "--header",
2729                 @args,
2730                 ("--max-count=" . $maxcount),
2731                 ("--skip=" . $skip),
2732                 @extra_options,
2733                 $commit_id,
2734                 "--",
2735                 ($filename ? ($filename) : ())
2736                 or die_error(500, "Open git-rev-list failed");
2737         while (my $line = <$fd>) {
2738                 my %co = parse_commit_text($line);
2739                 push @cos, \%co;
2740         }
2741         close $fd;
2742
2743         return wantarray ? @cos : \@cos;
2744 }
2745
2746 # parse line of git-diff-tree "raw" output
2747 sub parse_difftree_raw_line {
2748         my $line = shift;
2749         my %res;
2750
2751         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2752         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2753         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2754                 $res{'from_mode'} = $1;
2755                 $res{'to_mode'} = $2;
2756                 $res{'from_id'} = $3;
2757                 $res{'to_id'} = $4;
2758                 $res{'status'} = $5;
2759                 $res{'similarity'} = $6;
2760                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2761                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2762                 } else {
2763                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2764                 }
2765         }
2766         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2767         # combined diff (for merge commit)
2768         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2769                 $res{'nparents'}  = length($1);
2770                 $res{'from_mode'} = [ split(' ', $2) ];
2771                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2772                 $res{'from_id'} = [ split(' ', $3) ];
2773                 $res{'to_id'} = pop @{$res{'from_id'}};
2774                 $res{'status'} = [ split('', $4) ];
2775                 $res{'to_file'} = unquote($5);
2776         }
2777         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2778         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2779                 $res{'commit'} = $1;
2780         }
2781
2782         return wantarray ? %res : \%res;
2783 }
2784
2785 # wrapper: return parsed line of git-diff-tree "raw" output
2786 # (the argument might be raw line, or parsed info)
2787 sub parsed_difftree_line {
2788         my $line_or_ref = shift;
2789
2790         if (ref($line_or_ref) eq "HASH") {
2791                 # pre-parsed (or generated by hand)
2792                 return $line_or_ref;
2793         } else {
2794                 return parse_difftree_raw_line($line_or_ref);
2795         }
2796 }
2797
2798 # parse line of git-ls-tree output
2799 sub parse_ls_tree_line {
2800         my $line = shift;
2801         my %opts = @_;
2802         my %res;
2803
2804         if ($opts{'-l'}) {
2805                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2806                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2807
2808                 $res{'mode'} = $1;
2809                 $res{'type'} = $2;
2810                 $res{'hash'} = $3;
2811                 $res{'size'} = $4;
2812                 if ($opts{'-z'}) {
2813                         $res{'name'} = $5;
2814                 } else {
2815                         $res{'name'} = unquote($5);
2816                 }
2817         } else {
2818                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2819                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2820
2821                 $res{'mode'} = $1;
2822                 $res{'type'} = $2;
2823                 $res{'hash'} = $3;
2824                 if ($opts{'-z'}) {
2825                         $res{'name'} = $4;
2826                 } else {
2827                         $res{'name'} = unquote($4);
2828                 }
2829         }
2830
2831         return wantarray ? %res : \%res;
2832 }
2833
2834 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2835 sub parse_from_to_diffinfo {
2836         my ($diffinfo, $from, $to, @parents) = @_;
2837
2838         if ($diffinfo->{'nparents'}) {
2839                 # combined diff
2840                 $from->{'file'} = [];
2841                 $from->{'href'} = [];
2842                 fill_from_file_info($diffinfo, @parents)
2843                         unless exists $diffinfo->{'from_file'};
2844                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2845                         $from->{'file'}[$i] =
2846                                 defined $diffinfo->{'from_file'}[$i] ?
2847                                         $diffinfo->{'from_file'}[$i] :
2848                                         $diffinfo->{'to_file'};
2849                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2850                                 $from->{'href'}[$i] = href(action=>"blob",
2851                                                            hash_base=>$parents[$i],
2852                                                            hash=>$diffinfo->{'from_id'}[$i],
2853                                                            file_name=>$from->{'file'}[$i]);
2854                         } else {
2855                                 $from->{'href'}[$i] = undef;
2856                         }
2857                 }
2858         } else {
2859                 # ordinary (not combined) diff
2860                 $from->{'file'} = $diffinfo->{'from_file'};
2861                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2862                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2863                                                hash=>$diffinfo->{'from_id'},
2864                                                file_name=>$from->{'file'});
2865                 } else {
2866                         delete $from->{'href'};
2867                 }
2868         }
2869
2870         $to->{'file'} = $diffinfo->{'to_file'};
2871         if (!is_deleted($diffinfo)) { # file exists in result
2872                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2873                                      hash=>$diffinfo->{'to_id'},
2874                                      file_name=>$to->{'file'});
2875         } else {
2876                 delete $to->{'href'};
2877         }
2878 }
2879
2880 ## ......................................................................
2881 ## parse to array of hashes functions
2882
2883 sub git_get_heads_list {
2884         my $limit = shift;
2885         my @headslist;
2886
2887         open my $fd, '-|', git_cmd(), 'for-each-ref',
2888                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2889                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2890                 'refs/heads'
2891                 or return;
2892         while (my $line = <$fd>) {
2893                 my %ref_item;
2894
2895                 chomp $line;
2896                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2897                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2898                 my ($committer, $epoch, $tz) =
2899                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2900                 $ref_item{'fullname'}  = $name;
2901                 $name =~ s!^refs/heads/!!;
2902
2903                 $ref_item{'name'}  = $name;
2904                 $ref_item{'id'}    = $hash;
2905                 $ref_item{'title'} = $title || '(no commit message)';
2906                 $ref_item{'epoch'} = $epoch;
2907                 if ($epoch) {
2908                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2909                 } else {
2910                         $ref_item{'age'} = "unknown";
2911                 }
2912
2913                 push @headslist, \%ref_item;
2914         }
2915         close $fd;
2916
2917         return wantarray ? @headslist : \@headslist;
2918 }
2919
2920 sub git_get_tags_list {
2921         my $limit = shift;
2922         my @tagslist;
2923
2924         open my $fd, '-|', git_cmd(), 'for-each-ref',
2925                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2926                 '--format=%(objectname) %(objecttype) %(refname) '.
2927                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2928                 'refs/tags'
2929                 or return;
2930         while (my $line = <$fd>) {
2931                 my %ref_item;
2932
2933                 chomp $line;
2934                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2935                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2936                 my ($creator, $epoch, $tz) =
2937                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2938                 $ref_item{'fullname'} = $name;
2939                 $name =~ s!^refs/tags/!!;
2940
2941                 $ref_item{'type'} = $type;
2942                 $ref_item{'id'} = $id;
2943                 $ref_item{'name'} = $name;
2944                 if ($type eq "tag") {
2945                         $ref_item{'subject'} = $title;
2946                         $ref_item{'reftype'} = $reftype;
2947                         $ref_item{'refid'}   = $refid;
2948                 } else {
2949                         $ref_item{'reftype'} = $type;
2950                         $ref_item{'refid'}   = $id;
2951                 }
2952
2953                 if ($type eq "tag" || $type eq "commit") {
2954                         $ref_item{'epoch'} = $epoch;
2955                         if ($epoch) {
2956                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2957                         } else {
2958                                 $ref_item{'age'} = "unknown";
2959                         }
2960                 }
2961
2962                 push @tagslist, \%ref_item;
2963         }
2964         close $fd;
2965
2966         return wantarray ? @tagslist : \@tagslist;
2967 }
2968
2969 ## ----------------------------------------------------------------------
2970 ## filesystem-related functions
2971
2972 sub get_file_owner {
2973         my $path = shift;
2974
2975         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2976         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2977         if (!defined $gcos) {
2978                 return undef;
2979         }
2980         my $owner = $gcos;
2981         $owner =~ s/[,;].*$//;
2982         return to_utf8($owner);
2983 }
2984
2985 # assume that file exists
2986 sub insert_file {
2987         my $filename = shift;
2988
2989         open my $fd, '<', $filename;
2990         print map { to_utf8($_) } <$fd>;
2991         close $fd;
2992 }
2993
2994 ## ......................................................................
2995 ## mimetype related functions
2996
2997 sub mimetype_guess_file {
2998         my $filename = shift;
2999         my $mimemap = shift;
3000         -r $mimemap or return undef;
3001
3002         my %mimemap;
3003         open(my $mh, '<', $mimemap) or return undef;
3004         while (<$mh>) {
3005                 next if m/^#/; # skip comments
3006                 my ($mimetype, $exts) = split(/\t+/);
3007                 if (defined $exts) {
3008                         my @exts = split(/\s+/, $exts);
3009                         foreach my $ext (@exts) {
3010                                 $mimemap{$ext} = $mimetype;
3011                         }
3012                 }
3013         }
3014         close($mh);
3015
3016         $filename =~ /\.([^.]*)$/;
3017         return $mimemap{$1};
3018 }
3019
3020 sub mimetype_guess {
3021         my $filename = shift;
3022         my $mime;
3023         $filename =~ /\./ or return undef;
3024
3025         if ($mimetypes_file) {
3026                 my $file = $mimetypes_file;
3027                 if ($file !~ m!^/!) { # if it is relative path
3028                         # it is relative to project
3029                         $file = "$projectroot/$project/$file";
3030                 }
3031                 $mime = mimetype_guess_file($filename, $file);
3032         }
3033         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3034         return $mime;
3035 }
3036
3037 sub blob_mimetype {
3038         my $fd = shift;
3039         my $filename = shift;
3040
3041         if ($filename) {
3042                 my $mime = mimetype_guess($filename);
3043                 $mime and return $mime;
3044         }
3045
3046         # just in case
3047         return $default_blob_plain_mimetype unless $fd;
3048
3049         if (-T $fd) {
3050                 return 'text/plain';
3051         } elsif (! $filename) {
3052                 return 'application/octet-stream';
3053         } elsif ($filename =~ m/\.png$/i) {
3054                 return 'image/png';
3055         } elsif ($filename =~ m/\.gif$/i) {
3056                 return 'image/gif';
3057         } elsif ($filename =~ m/\.jpe?g$/i) {
3058                 return 'image/jpeg';
3059         } else {
3060                 return 'application/octet-stream';
3061         }
3062 }
3063
3064 sub blob_contenttype {
3065         my ($fd, $file_name, $type) = @_;
3066
3067         $type ||= blob_mimetype($fd, $file_name);
3068         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3069                 $type .= "; charset=$default_text_plain_charset";
3070         }
3071
3072         return $type;
3073 }
3074
3075 ## ======================================================================
3076 ## functions printing HTML: header, footer, error page
3077
3078 sub git_header_html {
3079         my $status = shift || "200 OK";
3080         my $expires = shift;
3081
3082         my $title = "$site_name";
3083         if (defined $project) {
3084                 $title .= " - " . to_utf8($project);
3085                 if (defined $action) {
3086                         $title .= "/$action";
3087                         if (defined $file_name) {
3088                                 $title .= " - " . esc_path($file_name);
3089                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3090                                         $title .= "/";
3091                                 }
3092                         }
3093                 }
3094         }
3095         my $content_type;
3096         # require explicit support from the UA if we are to send the page as
3097         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3098         # we have to do this because MSIE sometimes globs '*/*', pretending to
3099         # support xhtml+xml but choking when it gets what it asked for.
3100         if (defined $cgi->http('HTTP_ACCEPT') &&
3101             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3102             $cgi->Accept('application/xhtml+xml') != 0) {
3103                 $content_type = 'application/xhtml+xml';
3104         } else {
3105                 $content_type = 'text/html';
3106         }
3107         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3108                            -status=> $status, -expires => $expires);
3109         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3110         print <<EOF;
3111 <?xml version="1.0" encoding="utf-8"?>
3112 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3113 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3114 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3115 <!-- git core binaries version $git_version -->
3116 <head>
3117 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3118 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3119 <meta name="robots" content="index, nofollow"/>
3120 <title>$title</title>
3121 EOF
3122         # the stylesheet, favicon etc urls won't work correctly with path_info
3123         # unless we set the appropriate base URL
3124         if ($ENV{'PATH_INFO'}) {
3125                 print "<base href=\"".esc_url($base_url)."\" />\n";
3126         }
3127         # print out each stylesheet that exist, providing backwards capability
3128         # for those people who defined $stylesheet in a config file
3129         if (defined $stylesheet) {
3130                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3131         } else {
3132                 foreach my $stylesheet (@stylesheets) {
3133                         next unless $stylesheet;
3134                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3135                 }
3136         }
3137         if (defined $project) {
3138                 my %href_params = get_feed_info();
3139                 if (!exists $href_params{'-title'}) {
3140                         $href_params{'-title'} = 'log';
3141                 }
3142
3143                 foreach my $format qw(RSS Atom) {
3144                         my $type = lc($format);
3145                         my %link_attr = (
3146                                 '-rel' => 'alternate',
3147                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3148                                 '-type' => "application/$type+xml"
3149                         );
3150
3151                         $href_params{'action'} = $type;
3152                         $link_attr{'-href'} = href(%href_params);
3153                         print "<link ".
3154                               "rel=\"$link_attr{'-rel'}\" ".
3155                               "title=\"$link_attr{'-title'}\" ".
3156                               "href=\"$link_attr{'-href'}\" ".
3157                               "type=\"$link_attr{'-type'}\" ".
3158                               "/>\n";
3159
3160                         $href_params{'extra_options'} = '--no-merges';
3161                         $link_attr{'-href'} = href(%href_params);
3162                         $link_attr{'-title'} .= ' (no merges)';
3163                         print "<link ".
3164                               "rel=\"$link_attr{'-rel'}\" ".
3165                               "title=\"$link_attr{'-title'}\" ".
3166                               "href=\"$link_attr{'-href'}\" ".
3167                               "type=\"$link_attr{'-type'}\" ".
3168                               "/>\n";
3169                 }
3170
3171         } else {
3172                 printf('<link rel="alternate" title="%s projects list" '.
3173                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3174                        $site_name, href(project=>undef, action=>"project_index"));
3175                 printf('<link rel="alternate" title="%s projects feeds" '.
3176                        'href="%s" type="text/x-opml" />'."\n",
3177                        $site_name, href(project=>undef, action=>"opml"));
3178         }
3179         if (defined $favicon) {
3180                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3181         }
3182
3183         print "</head>\n" .
3184               "<body>\n";
3185
3186         if (-f $site_header) {
3187                 insert_file($site_header);
3188         }
3189
3190         print "<div class=\"page_header\">\n" .
3191               $cgi->a({-href => esc_url($logo_url),
3192                        -title => $logo_label},
3193                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3194         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3195         if (defined $project) {
3196                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3197                 if (defined $action) {
3198                         print " / $action";
3199                 }
3200                 print "\n";
3201         }
3202         print "</div>\n";
3203
3204         my $have_search = gitweb_check_feature('search');
3205         if (defined $project && $have_search) {
3206                 if (!defined $searchtext) {
3207                         $searchtext = "";
3208                 }
3209                 my $search_hash;
3210                 if (defined $hash_base) {
3211                         $search_hash = $hash_base;
3212                 } elsif (defined $hash) {
3213                         $search_hash = $hash;
3214                 } else {
3215                         $search_hash = "HEAD";
3216                 }
3217                 my $action = $my_uri;
3218                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3219                 if ($use_pathinfo) {
3220                         $action .= "/".esc_url($project);
3221                 }
3222                 print $cgi->startform(-method => "get", -action => $action) .
3223                       "<div class=\"search\">\n" .
3224                       (!$use_pathinfo &&
3225                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3226                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3227                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3228                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3229                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3230                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3231                       " search:\n",
3232                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3233                       "<span title=\"Extended regular expression\">" .
3234                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3235                                      -checked => $search_use_regexp) .
3236                       "</span>" .
3237                       "</div>" .
3238                       $cgi->end_form() . "\n";
3239         }
3240 }
3241
3242 sub git_footer_html {
3243         my $feed_class = 'rss_logo';
3244
3245         print "<div class=\"page_footer\">\n";
3246         if (defined $project) {
3247                 my $descr = git_get_project_description($project);
3248                 if (defined $descr) {
3249                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3250                 }
3251
3252                 my %href_params = get_feed_info();
3253                 if (!%href_params) {
3254                         $feed_class .= ' generic';
3255                 }
3256                 $href_params{'-title'} ||= 'log';
3257
3258                 foreach my $format qw(RSS Atom) {
3259                         $href_params{'action'} = lc($format);
3260                         print $cgi->a({-href => href(%href_params),
3261                                       -title => "$href_params{'-title'} $format feed",
3262                                       -class => $feed_class}, $format)."\n";
3263                 }
3264
3265         } else {
3266                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3267                               -class => $feed_class}, "OPML") . " ";
3268                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3269                               -class => $feed_class}, "TXT") . "\n";
3270         }
3271         print "</div>\n"; # class="page_footer"
3272
3273         if (-f $site_footer) {
3274                 insert_file($site_footer);
3275         }
3276
3277         print "</body>\n" .
3278               "</html>";
3279 }
3280
3281 # die_error(<http_status_code>, <error_message>)
3282 # Example: die_error(404, 'Hash not found')
3283 # By convention, use the following status codes (as defined in RFC 2616):
3284 # 400: Invalid or missing CGI parameters, or
3285 #      requested object exists but has wrong type.
3286 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3287 #      this server or project.
3288 # 404: Requested object/revision/project doesn't exist.
3289 # 500: The server isn't configured properly, or
3290 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3291 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3292 sub die_error {
3293         my $status = shift || 500;
3294         my $error = shift || "Internal server error";
3295
3296         my %http_responses = (400 => '400 Bad Request',
3297                               403 => '403 Forbidden',
3298                               404 => '404 Not Found',
3299                               500 => '500 Internal Server Error');
3300         git_header_html($http_responses{$status});
3301         print <<EOF;
3302 <div class="page_body">
3303 <br /><br />
3304 $status - $error
3305 <br />
3306 </div>
3307 EOF
3308         git_footer_html();
3309         exit;
3310 }
3311
3312 ## ----------------------------------------------------------------------
3313 ## functions printing or outputting HTML: navigation
3314
3315 sub git_print_page_nav {
3316         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3317         $extra = '' if !defined $extra; # pager or formats
3318
3319         my @navs = qw(summary shortlog log commit commitdiff tree);
3320         if ($suppress) {
3321                 @navs = grep { $_ ne $suppress } @navs;
3322         }
3323
3324         my %arg = map { $_ => {action=>$_} } @navs;
3325         if (defined $head) {
3326                 for (qw(commit commitdiff)) {
3327                         $arg{$_}{'hash'} = $head;
3328                 }
3329                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3330                         for (qw(shortlog log)) {
3331                                 $arg{$_}{'hash'} = $head;
3332                         }
3333                 }
3334         }
3335
3336         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3337         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3338
3339         my @actions = gitweb_get_feature('actions');
3340         my %repl = (
3341                 '%' => '%',
3342                 'n' => $project,         # project name
3343                 'f' => $git_dir,         # project path within filesystem
3344                 'h' => $treehead || '',  # current hash ('h' parameter)
3345                 'b' => $treebase || '',  # hash base ('hb' parameter)
3346         );
3347         while (@actions) {
3348                 my ($label, $link, $pos) = splice(@actions,0,3);
3349                 # insert
3350                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3351                 # munch munch
3352                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3353                 $arg{$label}{'_href'} = $link;
3354         }
3355
3356         print "<div class=\"page_nav\">\n" .
3357                 (join " | ",
3358                  map { $_ eq $current ?
3359                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3360                  } @navs);
3361         print "<br/>\n$extra<br/>\n" .
3362               "</div>\n";
3363 }
3364
3365 sub format_paging_nav {
3366         my ($action, $hash, $head, $page, $has_next_link) = @_;
3367         my $paging_nav;
3368
3369
3370         if ($hash ne $head || $page) {
3371                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3372         } else {
3373                 $paging_nav .= "HEAD";
3374         }
3375
3376         if ($page > 0) {
3377                 $paging_nav .= " &sdot; " .
3378                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3379                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3380         } else {
3381                 $paging_nav .= " &sdot; prev";
3382         }
3383
3384         if ($has_next_link) {
3385                 $paging_nav .= " &sdot; " .
3386                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3387                                  -accesskey => "n", -title => "Alt-n"}, "next");
3388         } else {
3389                 $paging_nav .= " &sdot; next";
3390         }
3391
3392         return $paging_nav;
3393 }
3394
3395 ## ......................................................................
3396 ## functions printing or outputting HTML: div
3397
3398 sub git_print_header_div {
3399         my ($action, $title, $hash, $hash_base) = @_;
3400         my %args = ();
3401
3402         $args{'action'} = $action;
3403         $args{'hash'} = $hash if $hash;
3404         $args{'hash_base'} = $hash_base if $hash_base;
3405
3406         print "<div class=\"header\">\n" .
3407               $cgi->a({-href => href(%args), -class => "title"},
3408               $title ? $title : $action) .
3409               "\n</div>\n";
3410 }
3411
3412 sub print_local_time {
3413         my %date = @_;
3414         if ($date{'hour_local'} < 6) {
3415                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3416                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3417         } else {
3418                 printf(" (%02d:%02d %s)",
3419                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3420         }
3421 }
3422
3423 # Outputs the author name and date in long form
3424 sub git_print_authorship {
3425         my $co = shift;
3426         my %opts = @_;
3427         my $tag = $opts{-tag} || 'div';
3428         my $author = $co->{'author_name'};
3429
3430         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3431         print "<$tag class=\"author_date\">" .
3432               format_search_author($author, "author", esc_html($author)) .
3433               " [$ad{'rfc2822'}";
3434         print_local_time(%ad) if ($opts{-localtime});
3435         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3436                   . "</$tag>\n";
3437 }
3438
3439 # Outputs table rows containing the full author or committer information,
3440 # in the format expected for 'commit' view (& similia).
3441 # Parameters are a commit hash reference, followed by the list of people
3442 # to output information for. If the list is empty it defalts to both
3443 # author and committer.
3444 sub git_print_authorship_rows {
3445         my $co = shift;
3446         # too bad we can't use @people = @_ || ('author', 'committer')
3447         my @people = @_;
3448         @people = ('author', 'committer') unless @people;
3449         foreach my $who (@people) {
3450                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3451                 print "<tr><td>$who</td><td>" .
3452                       format_search_author($co->{"${who}_name"}, $who,
3453                                esc_html($co->{"${who}_name"})) . " " .
3454                       format_search_author($co->{"${who}_email"}, $who,
3455                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3456                       "</td><td rowspan=\"2\">" .
3457                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3458                       "</td></tr>\n" .
3459                       "<tr>" .
3460                       "<td></td><td> $wd{'rfc2822'}";
3461                 print_local_time(%wd);
3462                 print "</td>" .
3463                       "</tr>\n";
3464         }
3465 }
3466
3467 sub git_print_page_path {
3468         my $name = shift;
3469         my $type = shift;
3470         my $hb = shift;
3471
3472
3473         print "<div class=\"page_path\">";
3474         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3475                       -title => 'tree root'}, to_utf8("[$project]"));
3476         print " / ";
3477         if (defined $name) {
3478                 my @dirname = split '/', $name;
3479                 my $basename = pop @dirname;
3480                 my $fullname = '';
3481
3482                 foreach my $dir (@dirname) {
3483                         $fullname .= ($fullname ? '/' : '') . $dir;
3484                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3485                                                      hash_base=>$hb),
3486                                       -title => $fullname}, esc_path($dir));
3487                         print " / ";
3488                 }
3489                 if (defined $type && $type eq 'blob') {
3490                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3491                                                      hash_base=>$hb),
3492                                       -title => $name}, esc_path($basename));
3493                 } elsif (defined $type && $type eq 'tree') {
3494                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3495                                                      hash_base=>$hb),
3496                                       -title => $name}, esc_path($basename));
3497                         print " / ";
3498                 } else {
3499                         print esc_path($basename);
3500                 }
3501         }
3502         print "<br/></div>\n";
3503 }
3504
3505 sub git_print_log {
3506         my $log = shift;
3507         my %opts = @_;
3508
3509         if ($opts{'-remove_title'}) {
3510                 # remove title, i.e. first line of log
3511                 shift @$log;
3512         }
3513         # remove leading empty lines
3514         while (defined $log->[0] && $log->[0] eq "") {
3515                 shift @$log;
3516         }
3517
3518         # print log
3519         my $signoff = 0;
3520         my $empty = 0;
3521         foreach my $line (@$log) {
3522                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3523                         $signoff = 1;
3524                         $empty = 0;
3525                         if (! $opts{'-remove_signoff'}) {
3526                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3527                                 next;
3528                         } else {
3529                                 # remove signoff lines
3530                                 next;
3531                         }
3532                 } else {
3533                         $signoff = 0;
3534                 }
3535
3536                 # print only one empty line
3537                 # do not print empty line after signoff
3538                 if ($line eq "") {
3539                         next if ($empty || $signoff);
3540                         $empty = 1;
3541                 } else {
3542                         $empty = 0;
3543                 }
3544
3545                 print format_log_line_html($line) . "<br/>\n";
3546         }
3547
3548         if ($opts{'-final_empty_line'}) {
3549                 # end with single empty line
3550                 print "<br/>\n" unless $empty;
3551         }
3552 }
3553
3554 # return link target (what link points to)
3555 sub git_get_link_target {
3556         my $hash = shift;
3557         my $link_target;
3558
3559         # read link
3560         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3561                 or return;
3562         {
3563                 local $/ = undef;
3564                 $link_target = <$fd>;
3565         }
3566         close $fd
3567                 or return;
3568
3569         return $link_target;
3570 }
3571
3572 # given link target, and the directory (basedir) the link is in,
3573 # return target of link relative to top directory (top tree);
3574 # return undef if it is not possible (including absolute links).
3575 sub normalize_link_target {
3576         my ($link_target, $basedir) = @_;
3577
3578         # absolute symlinks (beginning with '/') cannot be normalized
3579         return if (substr($link_target, 0, 1) eq '/');
3580
3581         # normalize link target to path from top (root) tree (dir)
3582         my $path;
3583         if ($basedir) {
3584                 $path = $basedir . '/' . $link_target;
3585         } else {
3586                 # we are in top (root) tree (dir)
3587                 $path = $link_target;
3588         }
3589
3590         # remove //, /./, and /../
3591         my @path_parts;
3592         foreach my $part (split('/', $path)) {
3593                 # discard '.' and ''
3594                 next if (!$part || $part eq '.');
3595                 # handle '..'
3596                 if ($part eq '..') {
3597                         if (@path_parts) {
3598                                 pop @path_parts;
3599                         } else {
3600                                 # link leads outside repository (outside top dir)
3601                                 return;
3602                         }
3603                 } else {
3604                         push @path_parts, $part;
3605                 }
3606         }
3607         $path = join('/', @path_parts);
3608
3609         return $path;
3610 }
3611
3612 # print tree entry (row of git_tree), but without encompassing <tr> element
3613 sub git_print_tree_entry {
3614         my ($t, $basedir, $hash_base, $have_blame) = @_;
3615
3616         my %base_key = ();
3617         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3618
3619         # The format of a table row is: mode list link.  Where mode is
3620         # the mode of the entry, list is the name of the entry, an href,
3621         # and link is the action links of the entry.
3622
3623         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3624         if (exists $t->{'size'}) {
3625                 print "<td class=\"size\">$t->{'size'}</td>\n";
3626         }
3627         if ($t->{'type'} eq "blob") {
3628                 print "<td class=\"list\">" .
3629                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3630                                                file_name=>"$basedir$t->{'name'}", %base_key),
3631                                 -class => "list"}, esc_path($t->{'name'}));
3632                 if (S_ISLNK(oct $t->{'mode'})) {
3633                         my $link_target = git_get_link_target($t->{'hash'});
3634                         if ($link_target) {
3635                                 my $norm_target = normalize_link_target($link_target, $basedir);
3636                                 if (defined $norm_target) {
3637                                         print " -> " .
3638                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3639                                                                      file_name=>$norm_target),
3640                                                        -title => $norm_target}, esc_path($link_target));
3641                                 } else {
3642                                         print " -> " . esc_path($link_target);
3643                                 }
3644                         }
3645                 }
3646                 print "</td>\n";
3647                 print "<td class=\"link\">";
3648                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3649                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3650                               "blob");
3651                 if ($have_blame) {
3652                         print " | " .
3653                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3654                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3655                                       "blame");
3656                 }
3657                 if (defined $hash_base) {
3658                         print " | " .
3659                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3660                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3661                                       "history");
3662                 }
3663                 print " | " .
3664                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3665                                                file_name=>"$basedir$t->{'name'}")},
3666                                 "raw");
3667                 print "</td>\n";
3668
3669         } elsif ($t->{'type'} eq "tree") {
3670                 print "<td class=\"list\">";
3671                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3672                                              file_name=>"$basedir$t->{'name'}",
3673                                              %base_key)},
3674                               esc_path($t->{'name'}));
3675                 print "</td>\n";
3676                 print "<td class=\"link\">";
3677                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3678                                              file_name=>"$basedir$t->{'name'}",
3679                                              %base_key)},
3680                               "tree");
3681                 if (defined $hash_base) {
3682                         print " | " .
3683                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3684                                                      file_name=>"$basedir$t->{'name'}")},
3685                                       "history");
3686                 }
3687                 print "</td>\n";
3688         } else {
3689                 # unknown object: we can only present history for it
3690                 # (this includes 'commit' object, i.e. submodule support)
3691                 print "<td class=\"list\">" .
3692                       esc_path($t->{'name'}) .
3693                       "</td>\n";
3694                 print "<td class=\"link\">";
3695                 if (defined $hash_base) {
3696                         print $cgi->a({-href => href(action=>"history",
3697                                                      hash_base=>$hash_base,
3698                                                      file_name=>"$basedir$t->{'name'}")},
3699                                       "history");
3700                 }
3701                 print "</td>\n";
3702         }
3703 }
3704
3705 ## ......................................................................
3706 ## functions printing large fragments of HTML
3707
3708 # get pre-image filenames for merge (combined) diff
3709 sub fill_from_file_info {
3710         my ($diff, @parents) = @_;
3711
3712         $diff->{'from_file'} = [ ];
3713         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3714         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3715                 if ($diff->{'status'}[$i] eq 'R' ||
3716                     $diff->{'status'}[$i] eq 'C') {
3717                         $diff->{'from_file'}[$i] =
3718                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3719                 }
3720         }
3721
3722         return $diff;
3723 }
3724
3725 # is current raw difftree line of file deletion
3726 sub is_deleted {
3727         my $diffinfo = shift;
3728
3729         return $diffinfo->{'to_id'} eq ('0' x 40);
3730 }
3731
3732 # does patch correspond to [previous] difftree raw line
3733 # $diffinfo  - hashref of parsed raw diff format
3734 # $patchinfo - hashref of parsed patch diff format
3735 #              (the same keys as in $diffinfo)
3736 sub is_patch_split {
3737         my ($diffinfo, $patchinfo) = @_;
3738
3739         return defined $diffinfo && defined $patchinfo
3740                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3741 }
3742
3743
3744 sub git_difftree_body {
3745         my ($difftree, $hash, @parents) = @_;
3746         my ($parent) = $parents[0];
3747         my $have_blame = gitweb_check_feature('blame');
3748         print "<div class=\"list_head\">\n";
3749         if ($#{$difftree} > 10) {
3750                 print(($#{$difftree} + 1) . " files changed:\n");
3751         }
3752         print "</div>\n";
3753
3754         print "<table class=\"" .
3755               (@parents > 1 ? "combined " : "") .
3756               "diff_tree\">\n";
3757
3758         # header only for combined diff in 'commitdiff' view
3759         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3760         if ($has_header) {
3761                 # table header
3762                 print "<thead><tr>\n" .
3763                        "<th></th><th></th>\n"; # filename, patchN link
3764                 for (my $i = 0; $i < @parents; $i++) {
3765                         my $par = $parents[$i];
3766                         print "<th>" .
3767                               $cgi->a({-href => href(action=>"commitdiff",
3768                                                      hash=>$hash, hash_parent=>$par),
3769                                        -title => 'commitdiff to parent number ' .
3770                                                   ($i+1) . ': ' . substr($par,0,7)},
3771                                       $i+1) .
3772                               "&nbsp;</th>\n";
3773                 }
3774                 print "</tr></thead>\n<tbody>\n";
3775         }
3776
3777         my $alternate = 1;
3778         my $patchno = 0;
3779         foreach my $line (@{$difftree}) {
3780                 my $diff = parsed_difftree_line($line);
3781
3782                 if ($alternate) {
3783                         print "<tr class=\"dark\">\n";
3784                 } else {
3785                         print "<tr class=\"light\">\n";
3786                 }
3787                 $alternate ^= 1;
3788
3789                 if (exists $diff->{'nparents'}) { # combined diff
3790
3791                         fill_from_file_info($diff, @parents)
3792                                 unless exists $diff->{'from_file'};
3793
3794                         if (!is_deleted($diff)) {
3795                                 # file exists in the result (child) commit
3796                                 print "<td>" .
3797                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3798                                                              file_name=>$diff->{'to_file'},
3799                                                              hash_base=>$hash),
3800                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3801                                       "</td>\n";
3802                         } else {
3803                                 print "<td>" .
3804                                       esc_path($diff->{'to_file'}) .
3805                                       "</td>\n";
3806                         }
3807
3808                         if ($action eq 'commitdiff') {
3809                                 # link to patch
3810                                 $patchno++;
3811                                 print "<td class=\"link\">" .
3812                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3813                                       " | " .
3814                                       "</td>\n";
3815                         }
3816
3817                         my $has_history = 0;
3818                         my $not_deleted = 0;
3819                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3820                                 my $hash_parent = $parents[$i];
3821                                 my $from_hash = $diff->{'from_id'}[$i];
3822                                 my $from_path = $diff->{'from_file'}[$i];
3823                                 my $status = $diff->{'status'}[$i];
3824
3825                                 $has_history ||= ($status ne 'A');
3826                                 $not_deleted ||= ($status ne 'D');
3827
3828                                 if ($status eq 'A') {
3829                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3830                                 } elsif ($status eq 'D') {
3831                                         print "<td class=\"link\">" .
3832                                               $cgi->a({-href => href(action=>"blob",
3833                                                                      hash_base=>$hash,
3834                                                                      hash=>$from_hash,
3835                                                                      file_name=>$from_path)},
3836                                                       "blob" . ($i+1)) .
3837                                               " | </td>\n";
3838                                 } else {
3839                                         if ($diff->{'to_id'} eq $from_hash) {
3840                                                 print "<td class=\"link nochange\">";
3841                                         } else {
3842                                                 print "<td class=\"link\">";
3843                                         }
3844                                         print $cgi->a({-href => href(action=>"blobdiff",
3845                                                                      hash=>$diff->{'to_id'},
3846                                                                      hash_parent=>$from_hash,
3847                                                                      hash_base=>$hash,
3848                                                                      hash_parent_base=>$hash_parent,
3849                                                                      file_name=>$diff->{'to_file'},
3850                                                                      file_parent=>$from_path)},
3851                                                       "diff" . ($i+1)) .
3852                                               " | </td>\n";
3853                                 }
3854                         }
3855
3856                         print "<td class=\"link\">";
3857                         if ($not_deleted) {
3858                                 print $cgi->a({-href => href(action=>"blob",
3859                                                              hash=>$diff->{'to_id'},
3860                                                              file_name=>$diff->{'to_file'},
3861                                                              hash_base=>$hash)},
3862                                               "blob");
3863                                 print " | " if ($has_history);
3864                         }
3865                         if ($has_history) {
3866                                 print $cgi->a({-href => href(action=>"history",
3867                                                              file_name=>$diff->{'to_file'},
3868                                                              hash_base=>$hash)},
3869                                               "history");
3870                         }
3871                         print "</td>\n";
3872
3873                         print "</tr>\n";
3874                         next; # instead of 'else' clause, to avoid extra indent
3875                 }
3876                 # else ordinary diff
3877
3878                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3879                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3880                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3881                         $to_mode_oct = oct $diff->{'to_mode'};
3882                         if (S_ISREG($to_mode_oct)) { # only for regular file
3883                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3884                         }
3885                         $to_file_type = file_type($diff->{'to_mode'});
3886                 }
3887                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3888                         $from_mode_oct = oct $diff->{'from_mode'};
3889                         if (S_ISREG($to_mode_oct)) { # only for regular file
3890                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3891                         }
3892                         $from_file_type = file_type($diff->{'from_mode'});
3893                 }
3894
3895                 if ($diff->{'status'} eq "A") { # created
3896                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3897                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3898                         $mode_chng   .= "]</span>";
3899                         print "<td>";
3900                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3901                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3902                                       -class => "list"}, esc_path($diff->{'file'}));
3903                         print "</td>\n";
3904                         print "<td>$mode_chng</td>\n";
3905                         print "<td class=\"link\">";
3906                         if ($action eq 'commitdiff') {
3907                                 # link to patch
3908                                 $patchno++;
3909                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3910                                 print " | ";
3911                         }
3912                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3913                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3914                                       "blob");
3915                         print "</td>\n";
3916
3917                 } elsif ($diff->{'status'} eq "D") { # deleted
3918                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3919                         print "<td>";
3920                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3921                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3922                                        -class => "list"}, esc_path($diff->{'file'}));
3923                         print "</td>\n";
3924                         print "<td>$mode_chng</td>\n";
3925                         print "<td class=\"link\">";
3926                         if ($action eq 'commitdiff') {
3927                                 # link to patch
3928                                 $patchno++;
3929                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3930                                 print " | ";
3931                         }
3932                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3933                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3934                                       "blob") . " | ";
3935                         if ($have_blame) {
3936                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3937                                                              file_name=>$diff->{'file'})},
3938                                               "blame") . " | ";
3939                         }
3940                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3941                                                      file_name=>$diff->{'file'})},
3942                                       "history");
3943                         print "</td>\n";
3944
3945                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3946                         my $mode_chnge = "";
3947                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3948                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3949                                 if ($from_file_type ne $to_file_type) {
3950                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3951                                 }
3952                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3953                                         if ($from_mode_str && $to_mode_str) {
3954                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3955                                         } elsif ($to_mode_str) {
3956                                                 $mode_chnge .= " mode: $to_mode_str";
3957                                         }
3958                                 }
3959                                 $mode_chnge .= "]</span>\n";
3960                         }
3961                         print "<td>";
3962                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3963                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3964                                       -class => "list"}, esc_path($diff->{'file'}));
3965                         print "</td>\n";
3966                         print "<td>$mode_chnge</td>\n";
3967                         print "<td class=\"link\">";
3968                         if ($action eq 'commitdiff') {
3969                                 # link to patch
3970                                 $patchno++;
3971                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3972                                       " | ";
3973                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3974                                 # "commit" view and modified file (not onlu mode changed)
3975                                 print $cgi->a({-href => href(action=>"blobdiff",
3976                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3977                                                              hash_base=>$hash, hash_parent_base=>$parent,
3978                                                              file_name=>$diff->{'file'})},
3979                                               "diff") .
3980                                       " | ";
3981                         }
3982                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3983                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3984                                        "blob") . " | ";
3985                         if ($have_blame) {
3986                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3987                                                              file_name=>$diff->{'file'})},
3988                                               "blame") . " | ";
3989                         }
3990                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3991                                                      file_name=>$diff->{'file'})},
3992                                       "history");
3993                         print "</td>\n";
3994
3995                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3996                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3997                         my $nstatus = $status_name{$diff->{'status'}};
3998                         my $mode_chng = "";
3999                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4000                                 # mode also for directories, so we cannot use $to_mode_str
4001                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4002                         }
4003                         print "<td>" .
4004                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4005                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4006                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4007                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4008                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4009                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4010                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4011                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4012                               "<td class=\"link\">";
4013                         if ($action eq 'commitdiff') {
4014                                 # link to patch
4015                                 $patchno++;
4016                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4017                                       " | ";
4018                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4019                                 # "commit" view and modified file (not only pure rename or copy)
4020                                 print $cgi->a({-href => href(action=>"blobdiff",
4021                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4022                                                              hash_base=>$hash, hash_parent_base=>$parent,
4023                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4024                                               "diff") .
4025                                       " | ";
4026                         }
4027                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4028                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4029                                       "blob") . " | ";
4030                         if ($have_blame) {
4031                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4032                                                              file_name=>$diff->{'to_file'})},
4033                                               "blame") . " | ";
4034                         }
4035                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4036                                                     file_name=>$diff->{'to_file'})},
4037                                       "history");
4038                         print "</td>\n";
4039
4040                 } # we should not encounter Unmerged (U) or Unknown (X) status
4041                 print "</tr>\n";
4042         }
4043         print "</tbody>" if $has_header;
4044         print "</table>\n";
4045 }
4046
4047 sub git_patchset_body {
4048         my ($fd, $difftree, $hash, @hash_parents) = @_;
4049         my ($hash_parent) = $hash_parents[0];
4050
4051         my $is_combined = (@hash_parents > 1);
4052         my $patch_idx = 0;
4053         my $patch_number = 0;
4054         my $patch_line;
4055         my $diffinfo;
4056         my $to_name;
4057         my (%from, %to);
4058
4059         print "<div class=\"patchset\">\n";
4060
4061         # skip to first patch
4062         while ($patch_line = <$fd>) {
4063                 chomp $patch_line;
4064
4065                 last if ($patch_line =~ m/^diff /);
4066         }
4067
4068  PATCH:
4069         while ($patch_line) {
4070
4071                 # parse "git diff" header line
4072                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4073                         # $1 is from_name, which we do not use
4074                         $to_name = unquote($2);
4075                         $to_name =~ s!^b/!!;
4076                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4077                         # $1 is 'cc' or 'combined', which we do not use
4078                         $to_name = unquote($2);
4079                 } else {
4080                         $to_name = undef;
4081                 }
4082
4083                 # check if current patch belong to current raw line
4084                 # and parse raw git-diff line if needed
4085                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4086                         # this is continuation of a split patch
4087                         print "<div class=\"patch cont\">\n";
4088                 } else {
4089                         # advance raw git-diff output if needed
4090                         $patch_idx++ if defined $diffinfo;
4091
4092                         # read and prepare patch information
4093                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4094
4095                         # compact combined diff output can have some patches skipped
4096                         # find which patch (using pathname of result) we are at now;
4097                         if ($is_combined) {
4098                                 while ($to_name ne $diffinfo->{'to_file'}) {
4099                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4100                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4101                                               "</div>\n";  # class="patch"
4102
4103                                         $patch_idx++;
4104                                         $patch_number++;
4105
4106                                         last if $patch_idx > $#$difftree;
4107                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4108                                 }
4109                         }
4110
4111                         # modifies %from, %to hashes
4112                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4113
4114                         # this is first patch for raw difftree line with $patch_idx index
4115                         # we index @$difftree array from 0, but number patches from 1
4116                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4117                 }
4118
4119                 # git diff header
4120                 #assert($patch_line =~ m/^diff /) if DEBUG;
4121                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4122                 $patch_number++;
4123                 # print "git diff" header
4124                 print format_git_diff_header_line($patch_line, $diffinfo,
4125                                                   \%from, \%to);
4126
4127                 # print extended diff header
4128                 print "<div class=\"diff extended_header\">\n";
4129         EXTENDED_HEADER:
4130                 while ($patch_line = <$fd>) {
4131                         chomp $patch_line;
4132
4133                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4134
4135                         print format_extended_diff_header_line($patch_line, $diffinfo,
4136                                                                \%from, \%to);
4137                 }
4138                 print "</div>\n"; # class="diff extended_header"
4139
4140                 # from-file/to-file diff header
4141                 if (! $patch_line) {
4142                         print "</div>\n"; # class="patch"
4143                         last PATCH;
4144                 }
4145                 next PATCH if ($patch_line =~ m/^diff /);
4146                 #assert($patch_line =~ m/^---/) if DEBUG;
4147
4148                 my $last_patch_line = $patch_line;
4149                 $patch_line = <$fd>;
4150                 chomp $patch_line;
4151                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4152
4153                 print format_diff_from_to_header($last_patch_line, $patch_line,
4154                                                  $diffinfo, \%from, \%to,
4155                                                  @hash_parents);
4156
4157                 # the patch itself
4158         LINE:
4159                 while ($patch_line = <$fd>) {
4160                         chomp $patch_line;
4161
4162                         next PATCH if ($patch_line =~ m/^diff /);
4163
4164                         print format_diff_line($patch_line, \%from, \%to);
4165                 }
4166
4167         } continue {
4168                 print "</div>\n"; # class="patch"
4169         }
4170
4171         # for compact combined (--cc) format, with chunk and patch simpliciaction
4172         # patchset might be empty, but there might be unprocessed raw lines
4173         for (++$patch_idx if $patch_number > 0;
4174              $patch_idx < @$difftree;
4175              ++$patch_idx) {
4176                 # read and prepare patch information
4177                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4178
4179                 # generate anchor for "patch" links in difftree / whatchanged part
4180                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4181                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4182                       "</div>\n";  # class="patch"
4183
4184                 $patch_number++;
4185         }
4186
4187         if ($patch_number == 0) {
4188                 if (@hash_parents > 1) {
4189                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4190                 } else {
4191                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4192                 }
4193         }
4194
4195         print "</div>\n"; # class="patchset"
4196 }
4197
4198 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4199
4200 # fills project list info (age, description, owner, forks) for each
4201 # project in the list, removing invalid projects from returned list
4202 # NOTE: modifies $projlist, but does not remove entries from it
4203 sub fill_project_list_info {
4204         my ($projlist, $check_forks) = @_;
4205         my @projects;
4206
4207         my $show_ctags = gitweb_check_feature('ctags');
4208  PROJECT:
4209         foreach my $pr (@$projlist) {
4210                 my (@activity) = git_get_last_activity($pr->{'path'});
4211                 unless (@activity) {
4212                         next PROJECT;
4213                 }
4214                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4215                 if (!defined $pr->{'descr'}) {
4216                         my $descr = git_get_project_description($pr->{'path'}) || "";
4217                         $descr = to_utf8($descr);
4218                         $pr->{'descr_long'} = $descr;
4219                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4220                 }
4221                 if (!defined $pr->{'owner'}) {
4222                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4223                 }
4224                 if ($check_forks) {
4225                         my $pname = $pr->{'path'};
4226                         if (($pname =~ s/\.git$//) &&
4227                             ($pname !~ /\/$/) &&
4228                             (-d "$projectroot/$pname")) {
4229                                 $pr->{'forks'} = "-d $projectroot/$pname";
4230                         } else {
4231                                 $pr->{'forks'} = 0;
4232                         }
4233                 }
4234                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4235                 push @projects, $pr;
4236         }
4237
4238         return @projects;
4239 }
4240
4241 # print 'sort by' <th> element, generating 'sort by $name' replay link
4242 # if that order is not selected
4243 sub print_sort_th {
4244         my ($name, $order, $header) = @_;
4245         $header ||= ucfirst($name);
4246
4247         if ($order eq $name) {
4248                 print "<th>$header</th>\n";
4249         } else {
4250                 print "<th>" .
4251                       $cgi->a({-href => href(-replay=>1, order=>$name),
4252                                -class => "header"}, $header) .
4253                       "</th>\n";
4254         }
4255 }
4256
4257 sub git_project_list_body {
4258         # actually uses global variable $project
4259         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4260
4261         my $check_forks = gitweb_check_feature('forks');
4262         my @projects = fill_project_list_info($projlist, $check_forks);
4263
4264         $order ||= $default_projects_order;
4265         $from = 0 unless defined $from;
4266         $to = $#projects if (!defined $to || $#projects < $to);
4267
4268         my %order_info = (
4269                 project => { key => 'path', type => 'str' },
4270                 descr => { key => 'descr_long', type => 'str' },
4271                 owner => { key => 'owner', type => 'str' },
4272                 age => { key => 'age', type => 'num' }
4273         );
4274         my $oi = $order_info{$order};
4275         if ($oi->{'type'} eq 'str') {
4276                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4277         } else {
4278                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4279         }
4280
4281         my $show_ctags = gitweb_check_feature('ctags');
4282         if ($show_ctags) {
4283                 my %ctags;
4284                 foreach my $p (@projects) {
4285                         foreach my $ct (keys %{$p->{'ctags'}}) {
4286                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4287                         }
4288                 }
4289                 my $cloud = git_populate_project_tagcloud(\%ctags);
4290                 print git_show_project_tagcloud($cloud, 64);
4291         }
4292
4293         print "<table class=\"project_list\">\n";
4294         unless ($no_header) {
4295                 print "<tr>\n";
4296                 if ($check_forks) {
4297                         print "<th></th>\n";
4298                 }
4299                 print_sort_th('project', $order, 'Project');
4300                 print_sort_th('descr', $order, 'Description');
4301                 print_sort_th('owner', $order, 'Owner');
4302                 print_sort_th('age', $order, 'Last Change');
4303                 print "<th></th>\n" . # for links
4304                       "</tr>\n";
4305         }
4306         my $alternate = 1;
4307         my $tagfilter = $cgi->param('by_tag');
4308         for (my $i = $from; $i <= $to; $i++) {
4309                 my $pr = $projects[$i];
4310
4311                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4312                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4313                         and not $pr->{'descr_long'} =~ /$searchtext/;
4314                 # Weed out forks or non-matching entries of search
4315                 if ($check_forks) {
4316                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4317                         $forkbase="^$forkbase" if $forkbase;
4318                         next if not $searchtext and not $tagfilter and $show_ctags
4319                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4320                 }
4321
4322                 if ($alternate) {
4323                         print "<tr class=\"dark\">\n";
4324                 } else {
4325                         print "<tr class=\"light\">\n";
4326                 }
4327                 $alternate ^= 1;
4328                 if ($check_forks) {
4329                         print "<td>";
4330                         if ($pr->{'forks'}) {
4331                                 print "<!-- $pr->{'forks'} -->\n";
4332                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4333                         }
4334                         print "</td>\n";
4335                 }
4336                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4337                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4338                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4339                                         -class => "list", -title => $pr->{'descr_long'}},
4340                                         esc_html($pr->{'descr'})) . "</td>\n" .
4341                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4342                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4343                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4344                       "<td class=\"link\">" .
4345                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4346                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4347                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4348                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4349                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4350                       "</td>\n" .
4351                       "</tr>\n";
4352         }
4353         if (defined $extra) {
4354                 print "<tr>\n";
4355                 if ($check_forks) {
4356                         print "<td></td>\n";
4357                 }
4358                 print "<td colspan=\"5\">$extra</td>\n" .
4359                       "</tr>\n";
4360         }
4361         print "</table>\n";
4362 }
4363
4364 sub git_shortlog_body {
4365         # uses global variable $project
4366         my ($commitlist, $from, $to, $refs, $extra) = @_;
4367
4368         $from = 0 unless defined $from;
4369         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4370
4371         print "<table class=\"shortlog\">\n";
4372         my $alternate = 1;
4373         for (my $i = $from; $i <= $to; $i++) {
4374                 my %co = %{$commitlist->[$i]};
4375                 my $commit = $co{'id'};
4376                 my $ref = format_ref_marker($refs, $commit);
4377                 if ($alternate) {
4378                         print "<tr class=\"dark\">\n";
4379                 } else {
4380                         print "<tr class=\"light\">\n";
4381                 }
4382                 $alternate ^= 1;
4383                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4384                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4385                       format_author_html('td', \%co, 10) . "<td>";
4386                 print format_subject_html($co{'title'}, $co{'title_short'},
4387                                           href(action=>"commit", hash=>$commit), $ref);
4388                 print "</td>\n" .
4389                       "<td class=\"link\">" .
4390                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4391                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4392                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4393                 my $snapshot_links = format_snapshot_links($commit);
4394                 if (defined $snapshot_links) {
4395                         print " | " . $snapshot_links;
4396                 }
4397                 print "</td>\n" .
4398                       "</tr>\n";
4399         }
4400         if (defined $extra) {
4401                 print "<tr>\n" .
4402                       "<td colspan=\"4\">$extra</td>\n" .
4403                       "</tr>\n";
4404         }
4405         print "</table>\n";
4406 }
4407
4408 sub git_history_body {
4409         # Warning: assumes constant type (blob or tree) during history
4410         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4411
4412         $from = 0 unless defined $from;
4413         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4414
4415         print "<table class=\"history\">\n";
4416         my $alternate = 1;
4417         for (my $i = $from; $i <= $to; $i++) {
4418                 my %co = %{$commitlist->[$i]};
4419                 if (!%co) {
4420                         next;
4421                 }
4422                 my $commit = $co{'id'};
4423
4424                 my $ref = format_ref_marker($refs, $commit);
4425
4426                 if ($alternate) {
4427                         print "<tr class=\"dark\">\n";
4428                 } else {
4429                         print "<tr class=\"light\">\n";
4430                 }
4431                 $alternate ^= 1;
4432                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4433         # shortlog:   format_author_html('td', \%co, 10)
4434                       format_author_html('td', \%co, 15, 3) . "<td>";
4435                 # originally git_history used chop_str($co{'title'}, 50)
4436                 print format_subject_html($co{'title'}, $co{'title_short'},
4437                                           href(action=>"commit", hash=>$commit), $ref);
4438                 print "</td>\n" .
4439                       "<td class=\"link\">" .
4440                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4441                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4442
4443                 if ($ftype eq 'blob') {
4444                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4445                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4446                         if (defined $blob_current && defined $blob_parent &&
4447                                         $blob_current ne $blob_parent) {
4448                                 print " | " .
4449                                         $cgi->a({-href => href(action=>"blobdiff",
4450                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4451                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4452                                                                file_name=>$file_name)},
4453                                                 "diff to current");
4454                         }
4455                 }
4456                 print "</td>\n" .
4457                       "</tr>\n";
4458         }
4459         if (defined $extra) {
4460                 print "<tr>\n" .
4461                       "<td colspan=\"4\">$extra</td>\n" .
4462                       "</tr>\n";
4463         }
4464         print "</table>\n";
4465 }
4466
4467 sub git_tags_body {
4468         # uses global variable $project
4469         my ($taglist, $from, $to, $extra) = @_;
4470         $from = 0 unless defined $from;
4471         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4472
4473         print "<table class=\"tags\">\n";
4474         my $alternate = 1;
4475         for (my $i = $from; $i <= $to; $i++) {
4476                 my $entry = $taglist->[$i];
4477                 my %tag = %$entry;
4478                 my $comment = $tag{'subject'};
4479                 my $comment_short;
4480                 if (defined $comment) {
4481                         $comment_short = chop_str($comment, 30, 5);
4482                 }
4483                 if ($alternate) {
4484                         print "<tr class=\"dark\">\n";
4485                 } else {
4486                         print "<tr class=\"light\">\n";
4487                 }
4488                 $alternate ^= 1;
4489                 if (defined $tag{'age'}) {
4490                         print "<td><i>$tag{'age'}</i></td>\n";
4491                 } else {
4492                         print "<td></td>\n";
4493                 }
4494                 print "<td>" .
4495                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4496                                -class => "list name"}, esc_html($tag{'name'})) .
4497                       "</td>\n" .
4498                       "<td>";
4499                 if (defined $comment) {
4500                         print format_subject_html($comment, $comment_short,
4501                                                   href(action=>"tag", hash=>$tag{'id'}));
4502                 }
4503                 print "</td>\n" .
4504                       "<td class=\"selflink\">";
4505                 if ($tag{'type'} eq "tag") {
4506                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4507                 } else {
4508                         print "&nbsp;";
4509                 }
4510                 print "</td>\n" .
4511                       "<td class=\"link\">" . " | " .
4512                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4513                 if ($tag{'reftype'} eq "commit") {
4514                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4515                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4516                 } elsif ($tag{'reftype'} eq "blob") {
4517                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4518                 }
4519                 print "</td>\n" .
4520                       "</tr>";
4521         }
4522         if (defined $extra) {
4523                 print "<tr>\n" .
4524                       "<td colspan=\"5\">$extra</td>\n" .
4525                       "</tr>\n";
4526         }
4527         print "</table>\n";
4528 }
4529
4530 sub git_heads_body {
4531         # uses global variable $project
4532         my ($headlist, $head, $from, $to, $extra) = @_;
4533         $from = 0 unless defined $from;
4534         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4535
4536         print "<table class=\"heads\">\n";
4537         my $alternate = 1;
4538         for (my $i = $from; $i <= $to; $i++) {
4539                 my $entry = $headlist->[$i];
4540                 my %ref = %$entry;
4541                 my $curr = $ref{'id'} eq $head;
4542                 if ($alternate) {
4543                         print "<tr class=\"dark\">\n";
4544                 } else {
4545                         print "<tr class=\"light\">\n";
4546                 }
4547                 $alternate ^= 1;
4548                 print "<td><i>$ref{'age'}</i></td>\n" .
4549                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4550                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4551                                -class => "list name"},esc_html($ref{'name'})) .
4552                       "</td>\n" .
4553                       "<td class=\"link\">" .
4554                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4555                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4556                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4557                       "</td>\n" .
4558                       "</tr>";
4559         }
4560         if (defined $extra) {
4561                 print "<tr>\n" .
4562                       "<td colspan=\"3\">$extra</td>\n" .
4563                       "</tr>\n";
4564         }
4565         print "</table>\n";
4566 }
4567
4568 sub git_search_grep_body {
4569         my ($commitlist, $from, $to, $extra) = @_;
4570         $from = 0 unless defined $from;
4571         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4572
4573         print "<table class=\"commit_search\">\n";
4574         my $alternate = 1;
4575         for (my $i = $from; $i <= $to; $i++) {
4576                 my %co = %{$commitlist->[$i]};
4577                 if (!%co) {
4578                         next;
4579                 }
4580                 my $commit = $co{'id'};
4581                 if ($alternate) {
4582                         print "<tr class=\"dark\">\n";
4583                 } else {
4584                         print "<tr class=\"light\">\n";
4585                 }
4586                 $alternate ^= 1;
4587                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4588                       format_author_html('td', \%co, 15, 5) .
4589                       "<td>" .
4590                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4591                                -class => "list subject"},
4592                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4593                 my $comment = $co{'comment'};
4594                 foreach my $line (@$comment) {
4595                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4596                                 my ($lead, $match, $trail) = ($1, $2, $3);
4597                                 $match = chop_str($match, 70, 5, 'center');
4598                                 my $contextlen = int((80 - length($match))/2);
4599                                 $contextlen = 30 if ($contextlen > 30);
4600                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4601                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4602
4603                                 $lead  = esc_html($lead);
4604                                 $match = esc_html($match);
4605                                 $trail = esc_html($trail);
4606
4607                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4608                         }
4609                 }
4610                 print "</td>\n" .
4611                       "<td class=\"link\">" .
4612                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4613                       " | " .
4614                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4615                       " | " .
4616                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4617                 print "</td>\n" .
4618                       "</tr>\n";
4619         }
4620         if (defined $extra) {
4621                 print "<tr>\n" .
4622                       "<td colspan=\"3\">$extra</td>\n" .
4623                       "</tr>\n";
4624         }
4625         print "</table>\n";
4626 }
4627
4628 ## ======================================================================
4629 ## ======================================================================
4630 ## actions
4631
4632 sub git_project_list {
4633         my $order = $input_params{'order'};
4634         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4635                 die_error(400, "Unknown order parameter");
4636         }
4637
4638         my @list = git_get_projects_list();
4639         if (!@list) {
4640                 die_error(404, "No projects found");
4641         }
4642
4643         git_header_html();
4644         if (-f $home_text) {
4645                 print "<div class=\"index_include\">\n";
4646                 insert_file($home_text);
4647                 print "</div>\n";
4648         }
4649         print $cgi->startform(-method => "get") .
4650               "<p class=\"projsearch\">Search:\n" .
4651               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4652               "</p>" .
4653               $cgi->end_form() . "\n";
4654         git_project_list_body(\@list, $order);
4655         git_footer_html();
4656 }
4657
4658 sub git_forks {
4659         my $order = $input_params{'order'};
4660         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4661                 die_error(400, "Unknown order parameter");
4662         }
4663
4664         my @list = git_get_projects_list($project);
4665         if (!@list) {
4666                 die_error(404, "No forks found");
4667         }
4668
4669         git_header_html();
4670         git_print_page_nav('','');
4671         git_print_header_div('summary', "$project forks");
4672         git_project_list_body(\@list, $order);
4673         git_footer_html();
4674 }
4675
4676 sub git_project_index {
4677         my @projects = git_get_projects_list($project);
4678
4679         print $cgi->header(
4680                 -type => 'text/plain',
4681                 -charset => 'utf-8',
4682                 -content_disposition => 'inline; filename="index.aux"');
4683
4684         foreach my $pr (@projects) {
4685                 if (!exists $pr->{'owner'}) {
4686                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4687                 }
4688
4689                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4690                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4691                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4692                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4693                 $path  =~ s/ /\+/g;
4694                 $owner =~ s/ /\+/g;
4695
4696                 print "$path $owner\n";
4697         }
4698 }
4699
4700 sub git_summary {
4701         my $descr = git_get_project_description($project) || "none";
4702         my %co = parse_commit("HEAD");
4703         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4704         my $head = $co{'id'};
4705
4706         my $owner = git_get_project_owner($project);
4707
4708         my $refs = git_get_references();
4709         # These get_*_list functions return one more to allow us to see if
4710         # there are more ...
4711         my @taglist  = git_get_tags_list(16);
4712         my @headlist = git_get_heads_list(16);
4713         my @forklist;
4714         my $check_forks = gitweb_check_feature('forks');
4715
4716         if ($check_forks) {
4717                 @forklist = git_get_projects_list($project);
4718         }
4719
4720         git_header_html();
4721         git_print_page_nav('summary','', $head);
4722
4723         print "<div class=\"title\">&nbsp;</div>\n";
4724         print "<table class=\"projects_list\">\n" .
4725               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4726               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4727         if (defined $cd{'rfc2822'}) {
4728                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4729         }
4730
4731         # use per project git URL list in $projectroot/$project/cloneurl
4732         # or make project git URL from git base URL and project name
4733         my $url_tag = "URL";
4734         my @url_list = git_get_project_url_list($project);
4735         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4736         foreach my $git_url (@url_list) {
4737                 next unless $git_url;
4738                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4739                 $url_tag = "";
4740         }
4741
4742         # Tag cloud
4743         my $show_ctags = gitweb_check_feature('ctags');
4744         if ($show_ctags) {
4745                 my $ctags = git_get_project_ctags($project);
4746                 my $cloud = git_populate_project_tagcloud($ctags);
4747                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4748                 print "</td>\n<td>" unless %$ctags;
4749                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4750                 print "</td>\n<td>" if %$ctags;
4751                 print git_show_project_tagcloud($cloud, 48);
4752                 print "</td></tr>";
4753         }
4754
4755         print "</table>\n";
4756
4757         # If XSS prevention is on, we don't include README.html.
4758         # TODO: Allow a readme in some safe format.
4759         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4760                 print "<div class=\"title\">readme</div>\n" .
4761                       "<div class=\"readme\">\n";
4762                 insert_file("$projectroot/$project/README.html");
4763                 print "\n</div>\n"; # class="readme"
4764         }
4765
4766         # we need to request one more than 16 (0..15) to check if
4767         # those 16 are all
4768         my @commitlist = $head ? parse_commits($head, 17) : ();
4769         if (@commitlist) {
4770                 git_print_header_div('shortlog');
4771                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4772                                   $#commitlist <=  15 ? undef :
4773                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4774         }
4775
4776         if (@taglist) {
4777                 git_print_header_div('tags');
4778                 git_tags_body(\@taglist, 0, 15,
4779                               $#taglist <=  15 ? undef :
4780                               $cgi->a({-href => href(action=>"tags")}, "..."));
4781         }
4782
4783         if (@headlist) {
4784                 git_print_header_div('heads');
4785                 git_heads_body(\@headlist, $head, 0, 15,
4786                                $#headlist <= 15 ? undef :
4787                                $cgi->a({-href => href(action=>"heads")}, "..."));
4788         }
4789
4790         if (@forklist) {
4791                 git_print_header_div('forks');
4792                 git_project_list_body(\@forklist, 'age', 0, 15,
4793                                       $#forklist <= 15 ? undef :
4794                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4795                                       'no_header');
4796         }
4797
4798         git_footer_html();
4799 }
4800
4801 sub git_tag {
4802         my $head = git_get_head_hash($project);
4803         git_header_html();
4804         git_print_page_nav('','', $head,undef,$head);
4805         my %tag = parse_tag($hash);
4806
4807         if (! %tag) {
4808                 die_error(404, "Unknown tag object");
4809         }
4810
4811         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4812         print "<div class=\"title_text\">\n" .
4813               "<table class=\"object_header\">\n" .
4814               "<tr>\n" .
4815               "<td>object</td>\n" .
4816               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4817                                $tag{'object'}) . "</td>\n" .
4818               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4819                                               $tag{'type'}) . "</td>\n" .
4820               "</tr>\n";
4821         if (defined($tag{'author'})) {
4822                 git_print_authorship_rows(\%tag, 'author');
4823         }
4824         print "</table>\n\n" .
4825               "</div>\n";
4826         print "<div class=\"page_body\">";
4827         my $comment = $tag{'comment'};
4828         foreach my $line (@$comment) {
4829                 chomp $line;
4830                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4831         }
4832         print "</div>\n";
4833         git_footer_html();
4834 }
4835
4836 sub git_blame {
4837         # permissions
4838         gitweb_check_feature('blame')
4839                 or die_error(403, "Blame view not allowed");
4840
4841         # error checking
4842         die_error(400, "No file name given") unless $file_name;
4843         $hash_base ||= git_get_head_hash($project);
4844         die_error(404, "Couldn't find base commit") unless $hash_base;
4845         my %co = parse_commit($hash_base)
4846                 or die_error(404, "Commit not found");
4847         my $ftype = "blob";
4848         if (!defined $hash) {
4849                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4850                         or die_error(404, "Error looking up file");
4851         } else {
4852                 $ftype = git_get_type($hash);
4853                 if ($ftype !~ "blob") {
4854                         die_error(400, "Object is not a blob");
4855                 }
4856         }
4857
4858         # run git-blame --porcelain
4859         open my $fd, "-|", git_cmd(), "blame", '-p',
4860                 $hash_base, '--', $file_name
4861                 or die_error(500, "Open git-blame failed");
4862
4863         # page header
4864         git_header_html();
4865         my $formats_nav =
4866                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4867                         "blob") .
4868                 " | " .
4869                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4870                         "history") .
4871                 " | " .
4872                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4873                         "HEAD");
4874         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4875         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4876         git_print_page_path($file_name, $ftype, $hash_base);
4877
4878         # page body
4879         my @rev_color = qw(light dark);
4880         my $num_colors = scalar(@rev_color);
4881         my $current_color = 0;
4882         my %metainfo = ();
4883
4884         print <<HTML;
4885 <div class="page_body">
4886 <table class="blame">
4887 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4888 HTML
4889  LINE:
4890         while (my $line = <$fd>) {
4891                 chomp $line;
4892                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4893                 # no <lines in group> for subsequent lines in group of lines
4894                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4895                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4896                 if (!exists $metainfo{$full_rev}) {
4897                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4898                 }
4899                 my $meta = $metainfo{$full_rev};
4900                 my $data;
4901                 while ($data = <$fd>) {
4902                         chomp $data;
4903                         last if ($data =~ s/^\t//); # contents of line
4904                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4905                                 $meta->{$1} = $2 unless exists $meta->{$1};
4906                         }
4907                         if ($data =~ /^previous /) {
4908                                 $meta->{'nprevious'}++;
4909                         }
4910                 }
4911                 my $short_rev = substr($full_rev, 0, 8);
4912                 my $author = $meta->{'author'};
4913                 my %date =
4914                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4915                 my $date = $date{'iso-tz'};
4916                 if ($group_size) {
4917                         $current_color = ($current_color + 1) % $num_colors;
4918                 }
4919                 my $tr_class = $rev_color[$current_color];
4920                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4921                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4922                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4923                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4924                 if ($group_size) {
4925                         print "<td class=\"sha1\"";
4926                         print " title=\"". esc_html($author) . ", $date\"";
4927                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4928                         print ">";
4929                         print $cgi->a({-href => href(action=>"commit",
4930                                                      hash=>$full_rev,
4931                                                      file_name=>$file_name)},
4932                                       esc_html($short_rev));
4933                         if ($group_size >= 2) {
4934                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4935                                 if (@author_initials) {
4936                                         print "<br />" .
4937                                               esc_html(join('', @author_initials));
4938                                         #           or join('.', ...)
4939                                 }
4940                         }
4941                         print "</td>\n";
4942                 }
4943                 # 'previous' <sha1 of parent commit> <filename at commit>
4944                 if (exists $meta->{'previous'} &&
4945                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4946                         $meta->{'parent'} = $1;
4947                         $meta->{'file_parent'} = unquote($2);
4948                 }
4949                 my $linenr_commit =
4950                         exists($meta->{'parent'}) ?
4951                         $meta->{'parent'} : $full_rev;
4952                 my $linenr_filename =
4953                         exists($meta->{'file_parent'}) ?
4954                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4955                 my $blamed = href(action => 'blame',
4956                                   file_name => $linenr_filename,
4957                                   hash_base => $linenr_commit);
4958                 print "<td class=\"linenr\">";
4959                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4960                                 -class => "linenr" },
4961                               esc_html($lineno));
4962                 print "</td>";
4963                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4964                 print "</tr>\n";
4965         }
4966         print "</table>\n";
4967         print "</div>";
4968         close $fd
4969                 or print "Reading blob failed\n";
4970
4971         # page footer
4972         git_footer_html();
4973 }
4974
4975 sub git_tags {
4976         my $head = git_get_head_hash($project);
4977         git_header_html();
4978         git_print_page_nav('','', $head,undef,$head);
4979         git_print_header_div('summary', $project);
4980
4981         my @tagslist = git_get_tags_list();
4982         if (@tagslist) {
4983                 git_tags_body(\@tagslist);
4984         }
4985         git_footer_html();
4986 }
4987
4988 sub git_heads {
4989         my $head = git_get_head_hash($project);
4990         git_header_html();
4991         git_print_page_nav('','', $head,undef,$head);
4992         git_print_header_div('summary', $project);
4993
4994         my @headslist = git_get_heads_list();
4995         if (@headslist) {
4996                 git_heads_body(\@headslist, $head);
4997         }
4998         git_footer_html();
4999 }
5000
5001 sub git_blob_plain {
5002         my $type = shift;
5003         my $expires;
5004
5005         if (!defined $hash) {
5006                 if (defined $file_name) {
5007                         my $base = $hash_base || git_get_head_hash($project);
5008                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5009                                 or die_error(404, "Cannot find file");
5010                 } else {
5011                         die_error(400, "No file name defined");
5012                 }
5013         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5014                 # blobs defined by non-textual hash id's can be cached
5015                 $expires = "+1d";
5016         }
5017
5018         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5019                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5020
5021         # content-type (can include charset)
5022         $type = blob_contenttype($fd, $file_name, $type);
5023
5024         # "save as" filename, even when no $file_name is given
5025         my $save_as = "$hash";
5026         if (defined $file_name) {
5027                 $save_as = $file_name;
5028         } elsif ($type =~ m/^text\//) {
5029                 $save_as .= '.txt';
5030         }
5031
5032         # With XSS prevention on, blobs of all types except a few known safe
5033         # ones are served with "Content-Disposition: attachment" to make sure
5034         # they don't run in our security domain.  For certain image types,
5035         # blob view writes an <img> tag referring to blob_plain view, and we
5036         # want to be sure not to break that by serving the image as an
5037         # attachment (though Firefox 3 doesn't seem to care).
5038         my $sandbox = $prevent_xss &&
5039                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5040
5041         print $cgi->header(
5042                 -type => $type,
5043                 -expires => $expires,
5044                 -content_disposition =>
5045                         ($sandbox ? 'attachment' : 'inline')
5046                         . '; filename="' . $save_as . '"');
5047         local $/ = undef;
5048         binmode STDOUT, ':raw';
5049         print <$fd>;
5050         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5051         close $fd;
5052 }
5053
5054 sub git_blob {
5055         my $expires;
5056
5057         if (!defined $hash) {
5058                 if (defined $file_name) {
5059                         my $base = $hash_base || git_get_head_hash($project);
5060                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5061                                 or die_error(404, "Cannot find file");
5062                 } else {
5063                         die_error(400, "No file name defined");
5064                 }
5065         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5066                 # blobs defined by non-textual hash id's can be cached
5067                 $expires = "+1d";
5068         }
5069
5070         my $have_blame = gitweb_check_feature('blame');
5071         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5072                 or die_error(500, "Couldn't cat $file_name, $hash");
5073         my $mimetype = blob_mimetype($fd, $file_name);
5074         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5075                 close $fd;
5076                 return git_blob_plain($mimetype);
5077         }
5078         # we can have blame only for text/* mimetype
5079         $have_blame &&= ($mimetype =~ m!^text/!);
5080
5081         git_header_html(undef, $expires);
5082         my $formats_nav = '';
5083         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5084                 if (defined $file_name) {
5085                         if ($have_blame) {
5086                                 $formats_nav .=
5087                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5088                                                 "blame") .
5089                                         " | ";
5090                         }
5091                         $formats_nav .=
5092                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5093                                         "history") .
5094                                 " | " .
5095                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5096                                         "raw") .
5097                                 " | " .
5098                                 $cgi->a({-href => href(action=>"blob",
5099                                                        hash_base=>"HEAD", file_name=>$file_name)},
5100                                         "HEAD");
5101                 } else {
5102                         $formats_nav .=
5103                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5104                                         "raw");
5105                 }
5106                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5107                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5108         } else {
5109                 print "<div class=\"page_nav\">\n" .
5110                       "<br/><br/></div>\n" .
5111                       "<div class=\"title\">$hash</div>\n";
5112         }
5113         git_print_page_path($file_name, "blob", $hash_base);
5114         print "<div class=\"page_body\">\n";
5115         if ($mimetype =~ m!^image/!) {
5116                 print qq!<img type="$mimetype"!;
5117                 if ($file_name) {
5118                         print qq! alt="$file_name" title="$file_name"!;
5119                 }
5120                 print qq! src="! .
5121                       href(action=>"blob_plain", hash=>$hash,
5122                            hash_base=>$hash_base, file_name=>$file_name) .
5123                       qq!" />\n!;
5124         } else {
5125                 my $nr;
5126                 while (my $line = <$fd>) {
5127                         chomp $line;
5128                         $nr++;
5129                         $line = untabify($line);
5130                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5131                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5132                 }
5133         }
5134         close $fd
5135                 or print "Reading blob failed.\n";
5136         print "</div>";
5137         git_footer_html();
5138 }
5139
5140 sub git_tree {
5141         if (!defined $hash_base) {
5142                 $hash_base = "HEAD";
5143         }
5144         if (!defined $hash) {
5145                 if (defined $file_name) {
5146                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5147                 } else {
5148                         $hash = $hash_base;
5149                 }
5150         }
5151         die_error(404, "No such tree") unless defined($hash);
5152
5153         my $show_sizes = gitweb_check_feature('show-sizes');
5154         my $have_blame = gitweb_check_feature('blame');
5155
5156         my @entries = ();
5157         {
5158                 local $/ = "\0";
5159                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5160                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5161                         or die_error(500, "Open git-ls-tree failed");
5162                 @entries = map { chomp; $_ } <$fd>;
5163                 close $fd
5164                         or die_error(404, "Reading tree failed");
5165         }
5166
5167         my $refs = git_get_references();
5168         my $ref = format_ref_marker($refs, $hash_base);
5169         git_header_html();
5170         my $basedir = '';
5171         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5172                 my @views_nav = ();
5173                 if (defined $file_name) {
5174                         push @views_nav,
5175                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5176                                         "history"),
5177                                 $cgi->a({-href => href(action=>"tree",
5178                                                        hash_base=>"HEAD", file_name=>$file_name)},
5179                                         "HEAD"),
5180                 }
5181                 my $snapshot_links = format_snapshot_links($hash);
5182                 if (defined $snapshot_links) {
5183                         # FIXME: Should be available when we have no hash base as well.
5184                         push @views_nav, $snapshot_links;
5185                 }
5186                 git_print_page_nav('tree','', $hash_base, undef, undef,
5187                                    join(' | ', @views_nav));
5188                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5189         } else {
5190                 undef $hash_base;
5191                 print "<div class=\"page_nav\">\n";
5192                 print "<br/><br/></div>\n";
5193                 print "<div class=\"title\">$hash</div>\n";
5194         }
5195         if (defined $file_name) {
5196                 $basedir = $file_name;
5197                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5198                         $basedir .= '/';
5199                 }
5200                 git_print_page_path($file_name, 'tree', $hash_base);
5201         }
5202         print "<div class=\"page_body\">\n";
5203         print "<table class=\"tree\">\n";
5204         my $alternate = 1;
5205         # '..' (top directory) link if possible
5206         if (defined $hash_base &&
5207             defined $file_name && $file_name =~ m![^/]+$!) {
5208                 if ($alternate) {
5209                         print "<tr class=\"dark\">\n";
5210                 } else {
5211                         print "<tr class=\"light\">\n";
5212                 }
5213                 $alternate ^= 1;
5214
5215                 my $up = $file_name;
5216                 $up =~ s!/?[^/]+$!!;
5217                 undef $up unless $up;
5218                 # based on git_print_tree_entry
5219                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5220                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5221                 print '<td class="list">';
5222                 print $cgi->a({-href => href(action=>"tree",
5223                                              hash_base=>$hash_base,
5224                                              file_name=>$up)},
5225                               "..");
5226                 print "</td>\n";
5227                 print "<td class=\"link\"></td>\n";
5228
5229                 print "</tr>\n";
5230         }
5231         foreach my $line (@entries) {
5232                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5233
5234                 if ($alternate) {
5235                         print "<tr class=\"dark\">\n";
5236                 } else {
5237                         print "<tr class=\"light\">\n";
5238                 }
5239                 $alternate ^= 1;
5240
5241                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5242
5243                 print "</tr>\n";
5244         }
5245         print "</table>\n" .
5246               "</div>";
5247         git_footer_html();
5248 }
5249
5250 sub git_snapshot {
5251         my $format = $input_params{'snapshot_format'};
5252         if (!@snapshot_fmts) {
5253                 die_error(403, "Snapshots not allowed");
5254         }
5255         # default to first supported snapshot format
5256         $format ||= $snapshot_fmts[0];
5257         if ($format !~ m/^[a-z0-9]+$/) {
5258                 die_error(400, "Invalid snapshot format parameter");
5259         } elsif (!exists($known_snapshot_formats{$format})) {
5260                 die_error(400, "Unknown snapshot format");
5261         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5262                 die_error(403, "Snapshot format not allowed");
5263         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5264                 die_error(403, "Unsupported snapshot format");
5265         }
5266
5267         if (!defined $hash) {
5268                 $hash = git_get_head_hash($project);
5269         }
5270
5271         my $name = $project;
5272         $name =~ s,([^/])/*\.git$,$1,;
5273         $name = basename($name);
5274         my $filename = to_utf8($name);
5275         $name =~ s/\047/\047\\\047\047/g;
5276         my $cmd;
5277         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5278         $cmd = quote_command(
5279                 git_cmd(), 'archive',
5280                 "--format=$known_snapshot_formats{$format}{'format'}",
5281                 "--prefix=$name/", $hash);
5282         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5283                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5284         }
5285
5286         print $cgi->header(
5287                 -type => $known_snapshot_formats{$format}{'type'},
5288                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5289                 -status => '200 OK');
5290
5291         open my $fd, "-|", $cmd
5292                 or die_error(500, "Execute git-archive failed");
5293         binmode STDOUT, ':raw';
5294         print <$fd>;
5295         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5296         close $fd;
5297 }
5298
5299 sub git_log {
5300         my $head = git_get_head_hash($project);
5301         if (!defined $hash) {
5302                 $hash = $head;
5303         }
5304         if (!defined $page) {
5305                 $page = 0;
5306         }
5307         my $refs = git_get_references();
5308
5309         my @commitlist = parse_commits($hash, 101, (100 * $page));
5310
5311         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5312
5313         my ($patch_max) = gitweb_get_feature('patches');
5314         if ($patch_max) {
5315                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5316                         $paging_nav .= " &sdot; " .
5317                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5318                                         "patches");
5319                 }
5320         }
5321
5322         git_header_html();
5323         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5324
5325         if (!@commitlist) {
5326                 my %co = parse_commit($hash);
5327
5328                 git_print_header_div('summary', $project);
5329                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5330         }
5331         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5332         for (my $i = 0; $i <= $to; $i++) {
5333                 my %co = %{$commitlist[$i]};
5334                 next if !%co;
5335                 my $commit = $co{'id'};
5336                 my $ref = format_ref_marker($refs, $commit);
5337                 my %ad = parse_date($co{'author_epoch'});
5338                 git_print_header_div('commit',
5339                                "<span class=\"age\">$co{'age_string'}</span>" .
5340                                esc_html($co{'title'}) . $ref,
5341                                $commit);
5342                 print "<div class=\"title_text\">\n" .
5343                       "<div class=\"log_link\">\n" .
5344                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5345                       " | " .
5346                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5347                       " | " .
5348                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5349                       "<br/>\n" .
5350                       "</div>\n";
5351                       git_print_authorship(\%co, -tag => 'span');
5352                       print "<br/>\n</div>\n";
5353
5354                 print "<div class=\"log_body\">\n";
5355                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5356                 print "</div>\n";
5357         }
5358         if ($#commitlist >= 100) {
5359                 print "<div class=\"page_nav\">\n";
5360                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5361                                -accesskey => "n", -title => "Alt-n"}, "next");
5362                 print "</div>\n";
5363         }
5364         git_footer_html();
5365 }
5366
5367 sub git_commit {
5368         $hash ||= $hash_base || "HEAD";
5369         my %co = parse_commit($hash)
5370             or die_error(404, "Unknown commit object");
5371
5372         my $parent  = $co{'parent'};
5373         my $parents = $co{'parents'}; # listref
5374
5375         # we need to prepare $formats_nav before any parameter munging
5376         my $formats_nav;
5377         if (!defined $parent) {
5378                 # --root commitdiff
5379                 $formats_nav .= '(initial)';
5380         } elsif (@$parents == 1) {
5381                 # single parent commit
5382                 $formats_nav .=
5383                         '(parent: ' .
5384                         $cgi->a({-href => href(action=>"commit",
5385                                                hash=>$parent)},
5386                                 esc_html(substr($parent, 0, 7))) .
5387                         ')';
5388         } else {
5389                 # merge commit
5390                 $formats_nav .=
5391                         '(merge: ' .
5392                         join(' ', map {
5393                                 $cgi->a({-href => href(action=>"commit",
5394                                                        hash=>$_)},
5395                                         esc_html(substr($_, 0, 7)));
5396                         } @$parents ) .
5397                         ')';
5398         }
5399         if (gitweb_check_feature('patches') && @$parents <= 1) {
5400                 $formats_nav .= " | " .
5401                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5402                                 "patch");
5403         }
5404
5405         if (!defined $parent) {
5406                 $parent = "--root";
5407         }
5408         my @difftree;
5409         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5410                 @diff_opts,
5411                 (@$parents <= 1 ? $parent : '-c'),
5412                 $hash, "--"
5413                 or die_error(500, "Open git-diff-tree failed");
5414         @difftree = map { chomp; $_ } <$fd>;
5415         close $fd or die_error(404, "Reading git-diff-tree failed");
5416
5417         # non-textual hash id's can be cached
5418         my $expires;
5419         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5420                 $expires = "+1d";
5421         }
5422         my $refs = git_get_references();
5423         my $ref = format_ref_marker($refs, $co{'id'});
5424
5425         git_header_html(undef, $expires);
5426         git_print_page_nav('commit', '',
5427                            $hash, $co{'tree'}, $hash,
5428                            $formats_nav);
5429
5430         if (defined $co{'parent'}) {
5431                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5432         } else {
5433                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5434         }
5435         print "<div class=\"title_text\">\n" .
5436               "<table class=\"object_header\">\n";
5437         git_print_authorship_rows(\%co);
5438         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5439         print "<tr>" .
5440               "<td>tree</td>" .
5441               "<td class=\"sha1\">" .
5442               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5443                        class => "list"}, $co{'tree'}) .
5444               "</td>" .
5445               "<td class=\"link\">" .
5446               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5447                       "tree");
5448         my $snapshot_links = format_snapshot_links($hash);
5449         if (defined $snapshot_links) {
5450                 print " | " . $snapshot_links;
5451         }
5452         print "</td>" .
5453               "</tr>\n";
5454
5455         foreach my $par (@$parents) {
5456                 print "<tr>" .
5457                       "<td>parent</td>" .
5458                       "<td class=\"sha1\">" .
5459                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5460                                class => "list"}, $par) .
5461                       "</td>" .
5462                       "<td class=\"link\">" .
5463                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5464                       " | " .
5465                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5466                       "</td>" .
5467                       "</tr>\n";
5468         }
5469         print "</table>".
5470               "</div>\n";
5471
5472         print "<div class=\"page_body\">\n";
5473         git_print_log($co{'comment'});
5474         print "</div>\n";
5475
5476         git_difftree_body(\@difftree, $hash, @$parents);
5477
5478         git_footer_html();
5479 }
5480
5481 sub git_object {
5482         # object is defined by:
5483         # - hash or hash_base alone
5484         # - hash_base and file_name
5485         my $type;
5486
5487         # - hash or hash_base alone
5488         if ($hash || ($hash_base && !defined $file_name)) {
5489                 my $object_id = $hash || $hash_base;
5490
5491                 open my $fd, "-|", quote_command(
5492                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5493                         or die_error(404, "Object does not exist");
5494                 $type = <$fd>;
5495                 chomp $type;
5496                 close $fd
5497                         or die_error(404, "Object does not exist");
5498
5499         # - hash_base and file_name
5500         } elsif ($hash_base && defined $file_name) {
5501                 $file_name =~ s,/+$,,;
5502
5503                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5504                         or die_error(404, "Base object does not exist");
5505
5506                 # here errors should not hapen
5507                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5508                         or die_error(500, "Open git-ls-tree failed");
5509                 my $line = <$fd>;
5510                 close $fd;
5511
5512                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5513                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5514                         die_error(404, "File or directory for given base does not exist");
5515                 }
5516                 $type = $2;
5517                 $hash = $3;
5518         } else {
5519                 die_error(400, "Not enough information to find object");
5520         }
5521
5522         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5523                                           hash=>$hash, hash_base=>$hash_base,
5524                                           file_name=>$file_name),
5525                              -status => '302 Found');
5526 }
5527
5528 sub git_blobdiff {
5529         my $format = shift || 'html';
5530
5531         my $fd;
5532         my @difftree;
5533         my %diffinfo;
5534         my $expires;
5535
5536         # preparing $fd and %diffinfo for git_patchset_body
5537         # new style URI
5538         if (defined $hash_base && defined $hash_parent_base) {
5539                 if (defined $file_name) {
5540                         # read raw output
5541                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5542                                 $hash_parent_base, $hash_base,
5543                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5544                                 or die_error(500, "Open git-diff-tree failed");
5545                         @difftree = map { chomp; $_ } <$fd>;
5546                         close $fd
5547                                 or die_error(404, "Reading git-diff-tree failed");
5548                         @difftree
5549                                 or die_error(404, "Blob diff not found");
5550
5551                 } elsif (defined $hash &&
5552                          $hash =~ /[0-9a-fA-F]{40}/) {
5553                         # try to find filename from $hash
5554
5555                         # read filtered raw output
5556                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5557                                 $hash_parent_base, $hash_base, "--"
5558                                 or die_error(500, "Open git-diff-tree failed");
5559                         @difftree =
5560                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5561                                 # $hash == to_id
5562                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5563                                 map { chomp; $_ } <$fd>;
5564                         close $fd
5565                                 or die_error(404, "Reading git-diff-tree failed");
5566                         @difftree
5567                                 or die_error(404, "Blob diff not found");
5568
5569                 } else {
5570                         die_error(400, "Missing one of the blob diff parameters");
5571                 }
5572
5573                 if (@difftree > 1) {
5574                         die_error(400, "Ambiguous blob diff specification");
5575                 }
5576
5577                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5578                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5579                 $file_name   ||= $diffinfo{'to_file'};
5580
5581                 $hash_parent ||= $diffinfo{'from_id'};
5582                 $hash        ||= $diffinfo{'to_id'};
5583
5584                 # non-textual hash id's can be cached
5585                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5586                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5587                         $expires = '+1d';
5588                 }
5589
5590                 # open patch output
5591                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5592                         '-p', ($format eq 'html' ? "--full-index" : ()),
5593                         $hash_parent_base, $hash_base,
5594                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5595                         or die_error(500, "Open git-diff-tree failed");
5596         }
5597
5598         # old/legacy style URI -- not generated anymore since 1.4.3.
5599         if (!%diffinfo) {
5600                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5601         }
5602
5603         # header
5604         if ($format eq 'html') {
5605                 my $formats_nav =
5606                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5607                                 "raw");
5608                 git_header_html(undef, $expires);
5609                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5610                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5611                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5612                 } else {
5613                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5614                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5615                 }
5616                 if (defined $file_name) {
5617                         git_print_page_path($file_name, "blob", $hash_base);
5618                 } else {
5619                         print "<div class=\"page_path\"></div>\n";
5620                 }
5621
5622         } elsif ($format eq 'plain') {
5623                 print $cgi->header(
5624                         -type => 'text/plain',
5625                         -charset => 'utf-8',
5626                         -expires => $expires,
5627                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5628
5629                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5630
5631         } else {
5632                 die_error(400, "Unknown blobdiff format");
5633         }
5634
5635         # patch
5636         if ($format eq 'html') {
5637                 print "<div class=\"page_body\">\n";
5638
5639                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5640                 close $fd;
5641
5642                 print "</div>\n"; # class="page_body"
5643                 git_footer_html();
5644
5645         } else {
5646                 while (my $line = <$fd>) {
5647                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5648                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5649
5650                         print $line;
5651
5652                         last if $line =~ m!^\+\+\+!;
5653                 }
5654                 local $/ = undef;
5655                 print <$fd>;
5656                 close $fd;
5657         }
5658 }
5659
5660 sub git_blobdiff_plain {
5661         git_blobdiff('plain');
5662 }
5663
5664 sub git_commitdiff {
5665         my %params = @_;
5666         my $format = $params{-format} || 'html';
5667
5668         my ($patch_max) = gitweb_get_feature('patches');
5669         if ($format eq 'patch') {
5670                 die_error(403, "Patch view not allowed") unless $patch_max;
5671         }
5672
5673         $hash ||= $hash_base || "HEAD";
5674         my %co = parse_commit($hash)
5675             or die_error(404, "Unknown commit object");
5676
5677         # choose format for commitdiff for merge
5678         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5679                 $hash_parent = '--cc';
5680         }
5681         # we need to prepare $formats_nav before almost any parameter munging
5682         my $formats_nav;
5683         if ($format eq 'html') {
5684                 $formats_nav =
5685                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5686                                 "raw");
5687                 if ($patch_max && @{$co{'parents'}} <= 1) {
5688                         $formats_nav .= " | " .
5689                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5690                                         "patch");
5691                 }
5692
5693                 if (defined $hash_parent &&
5694                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5695                         # commitdiff with two commits given
5696                         my $hash_parent_short = $hash_parent;
5697                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5698                                 $hash_parent_short = substr($hash_parent, 0, 7);
5699                         }
5700                         $formats_nav .=
5701                                 ' (from';
5702                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5703                                 if ($co{'parents'}[$i] eq $hash_parent) {
5704                                         $formats_nav .= ' parent ' . ($i+1);
5705                                         last;
5706                                 }
5707                         }
5708                         $formats_nav .= ': ' .
5709                                 $cgi->a({-href => href(action=>"commitdiff",
5710                                                        hash=>$hash_parent)},
5711                                         esc_html($hash_parent_short)) .
5712                                 ')';
5713                 } elsif (!$co{'parent'}) {
5714                         # --root commitdiff
5715                         $formats_nav .= ' (initial)';
5716                 } elsif (scalar @{$co{'parents'}} == 1) {
5717                         # single parent commit
5718                         $formats_nav .=
5719                                 ' (parent: ' .
5720                                 $cgi->a({-href => href(action=>"commitdiff",
5721                                                        hash=>$co{'parent'})},
5722                                         esc_html(substr($co{'parent'}, 0, 7))) .
5723                                 ')';
5724                 } else {
5725                         # merge commit
5726                         if ($hash_parent eq '--cc') {
5727                                 $formats_nav .= ' | ' .
5728                                         $cgi->a({-href => href(action=>"commitdiff",
5729                                                                hash=>$hash, hash_parent=>'-c')},
5730                                                 'combined');
5731                         } else { # $hash_parent eq '-c'
5732                                 $formats_nav .= ' | ' .
5733                                         $cgi->a({-href => href(action=>"commitdiff",
5734                                                                hash=>$hash, hash_parent=>'--cc')},
5735                                                 'compact');
5736                         }
5737                         $formats_nav .=
5738                                 ' (merge: ' .
5739                                 join(' ', map {
5740                                         $cgi->a({-href => href(action=>"commitdiff",
5741                                                                hash=>$_)},
5742                                                 esc_html(substr($_, 0, 7)));
5743                                 } @{$co{'parents'}} ) .
5744                                 ')';
5745                 }
5746         }
5747
5748         my $hash_parent_param = $hash_parent;
5749         if (!defined $hash_parent_param) {
5750                 # --cc for multiple parents, --root for parentless
5751                 $hash_parent_param =
5752                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5753         }
5754
5755         # read commitdiff
5756         my $fd;
5757         my @difftree;
5758         if ($format eq 'html') {
5759                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5760                         "--no-commit-id", "--patch-with-raw", "--full-index",
5761                         $hash_parent_param, $hash, "--"
5762                         or die_error(500, "Open git-diff-tree failed");
5763
5764                 while (my $line = <$fd>) {
5765                         chomp $line;
5766                         # empty line ends raw part of diff-tree output
5767                         last unless $line;
5768                         push @difftree, scalar parse_difftree_raw_line($line);
5769                 }
5770
5771         } elsif ($format eq 'plain') {
5772                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5773                         '-p', $hash_parent_param, $hash, "--"
5774                         or die_error(500, "Open git-diff-tree failed");
5775         } elsif ($format eq 'patch') {
5776                 # For commit ranges, we limit the output to the number of
5777                 # patches specified in the 'patches' feature.
5778                 # For single commits, we limit the output to a single patch,
5779                 # diverging from the git-format-patch default.
5780                 my @commit_spec = ();
5781                 if ($hash_parent) {
5782                         if ($patch_max > 0) {
5783                                 push @commit_spec, "-$patch_max";
5784                         }
5785                         push @commit_spec, '-n', "$hash_parent..$hash";
5786                 } else {
5787                         if ($params{-single}) {
5788                                 push @commit_spec, '-1';
5789                         } else {
5790                                 if ($patch_max > 0) {
5791                                         push @commit_spec, "-$patch_max";
5792                                 }
5793                                 push @commit_spec, "-n";
5794                         }
5795                         push @commit_spec, '--root', $hash;
5796                 }
5797                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5798                         '--stdout', @commit_spec
5799                         or die_error(500, "Open git-format-patch failed");
5800         } else {
5801                 die_error(400, "Unknown commitdiff format");
5802         }
5803
5804         # non-textual hash id's can be cached
5805         my $expires;
5806         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5807                 $expires = "+1d";
5808         }
5809
5810         # write commit message
5811         if ($format eq 'html') {
5812                 my $refs = git_get_references();
5813                 my $ref = format_ref_marker($refs, $co{'id'});
5814
5815                 git_header_html(undef, $expires);
5816                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5817                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5818                 print "<div class=\"title_text\">\n" .
5819                       "<table class=\"object_header\">\n";
5820                 git_print_authorship_rows(\%co);
5821                 print "</table>".
5822                       "</div>\n";
5823                 print "<div class=\"page_body\">\n";
5824                 if (@{$co{'comment'}} > 1) {
5825                         print "<div class=\"log\">\n";
5826                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5827                         print "</div>\n"; # class="log"
5828                 }
5829
5830         } elsif ($format eq 'plain') {
5831                 my $refs = git_get_references("tags");
5832                 my $tagname = git_get_rev_name_tags($hash);
5833                 my $filename = basename($project) . "-$hash.patch";
5834
5835                 print $cgi->header(
5836                         -type => 'text/plain',
5837                         -charset => 'utf-8',
5838                         -expires => $expires,
5839                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5840                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5841                 print "From: " . to_utf8($co{'author'}) . "\n";
5842                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5843                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5844
5845                 print "X-Git-Tag: $tagname\n" if $tagname;
5846                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5847
5848                 foreach my $line (@{$co{'comment'}}) {
5849                         print to_utf8($line) . "\n";
5850                 }
5851                 print "---\n\n";
5852         } elsif ($format eq 'patch') {
5853                 my $filename = basename($project) . "-$hash.patch";
5854
5855                 print $cgi->header(
5856                         -type => 'text/plain',
5857                         -charset => 'utf-8',
5858                         -expires => $expires,
5859                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5860         }
5861
5862         # write patch
5863         if ($format eq 'html') {
5864                 my $use_parents = !defined $hash_parent ||
5865                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5866                 git_difftree_body(\@difftree, $hash,
5867                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5868                 print "<br/>\n";
5869
5870                 git_patchset_body($fd, \@difftree, $hash,
5871                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5872                 close $fd;
5873                 print "</div>\n"; # class="page_body"
5874                 git_footer_html();
5875
5876         } elsif ($format eq 'plain') {
5877                 local $/ = undef;
5878                 print <$fd>;
5879                 close $fd
5880                         or print "Reading git-diff-tree failed\n";
5881         } elsif ($format eq 'patch') {
5882                 local $/ = undef;
5883                 print <$fd>;
5884                 close $fd
5885                         or print "Reading git-format-patch failed\n";
5886         }
5887 }
5888
5889 sub git_commitdiff_plain {
5890         git_commitdiff(-format => 'plain');
5891 }
5892
5893 # format-patch-style patches
5894 sub git_patch {
5895         git_commitdiff(-format => 'patch', -single => 1);
5896 }
5897
5898 sub git_patches {
5899         git_commitdiff(-format => 'patch');
5900 }
5901
5902 sub git_history {
5903         if (!defined $hash_base) {
5904                 $hash_base = git_get_head_hash($project);
5905         }
5906         if (!defined $page) {
5907                 $page = 0;
5908         }
5909         my $ftype;
5910         my %co = parse_commit($hash_base)
5911             or die_error(404, "Unknown commit object");
5912
5913         my $refs = git_get_references();
5914         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5915
5916         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5917                                        $file_name, "--full-history")
5918             or die_error(404, "No such file or directory on given branch");
5919
5920         if (!defined $hash && defined $file_name) {
5921                 # some commits could have deleted file in question,
5922                 # and not have it in tree, but one of them has to have it
5923                 for (my $i = 0; $i <= @commitlist; $i++) {
5924                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5925                         last if defined $hash;
5926                 }
5927         }
5928         if (defined $hash) {
5929                 $ftype = git_get_type($hash);
5930         }
5931         if (!defined $ftype) {
5932                 die_error(500, "Unknown type of object");
5933         }
5934
5935         my $paging_nav = '';
5936         if ($page > 0) {
5937                 $paging_nav .=
5938                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5939                                                file_name=>$file_name)},
5940                                 "first");
5941                 $paging_nav .= " &sdot; " .
5942                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5943                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5944         } else {
5945                 $paging_nav .= "first";
5946                 $paging_nav .= " &sdot; prev";
5947         }
5948         my $next_link = '';
5949         if ($#commitlist >= 100) {
5950                 $next_link =
5951                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5952                                  -accesskey => "n", -title => "Alt-n"}, "next");
5953                 $paging_nav .= " &sdot; $next_link";
5954         } else {
5955                 $paging_nav .= " &sdot; next";
5956         }
5957
5958         git_header_html();
5959         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5960         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5961         git_print_page_path($file_name, $ftype, $hash_base);
5962
5963         git_history_body(\@commitlist, 0, 99,
5964                          $refs, $hash_base, $ftype, $next_link);
5965
5966         git_footer_html();
5967 }
5968
5969 sub git_search {
5970         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5971         if (!defined $searchtext) {
5972                 die_error(400, "Text field is empty");
5973         }
5974         if (!defined $hash) {
5975                 $hash = git_get_head_hash($project);
5976         }
5977         my %co = parse_commit($hash);
5978         if (!%co) {
5979                 die_error(404, "Unknown commit object");
5980         }
5981         if (!defined $page) {
5982                 $page = 0;
5983         }
5984
5985         $searchtype ||= 'commit';
5986         if ($searchtype eq 'pickaxe') {
5987                 # pickaxe may take all resources of your box and run for several minutes
5988                 # with every query - so decide by yourself how public you make this feature
5989                 gitweb_check_feature('pickaxe')
5990                     or die_error(403, "Pickaxe is disabled");
5991         }
5992         if ($searchtype eq 'grep') {
5993                 gitweb_check_feature('grep')
5994                     or die_error(403, "Grep is disabled");
5995         }
5996
5997         git_header_html();
5998
5999         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6000                 my $greptype;
6001                 if ($searchtype eq 'commit') {
6002                         $greptype = "--grep=";
6003                 } elsif ($searchtype eq 'author') {
6004                         $greptype = "--author=";
6005                 } elsif ($searchtype eq 'committer') {
6006                         $greptype = "--committer=";
6007                 }
6008                 $greptype .= $searchtext;
6009                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6010                                                $greptype, '--regexp-ignore-case',
6011                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6012
6013                 my $paging_nav = '';
6014                 if ($page > 0) {
6015                         $paging_nav .=
6016                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6017                                                        searchtext=>$searchtext,
6018                                                        searchtype=>$searchtype)},
6019                                         "first");
6020                         $paging_nav .= " &sdot; " .
6021                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6022                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6023                 } else {
6024                         $paging_nav .= "first";
6025                         $paging_nav .= " &sdot; prev";
6026                 }
6027                 my $next_link = '';
6028                 if ($#commitlist >= 100) {
6029                         $next_link =
6030                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6031                                          -accesskey => "n", -title => "Alt-n"}, "next");
6032                         $paging_nav .= " &sdot; $next_link";
6033                 } else {
6034                         $paging_nav .= " &sdot; next";
6035                 }
6036
6037                 if ($#commitlist >= 100) {
6038                 }
6039
6040                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6041                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6042                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6043         }
6044
6045         if ($searchtype eq 'pickaxe') {
6046                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6047                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6048
6049                 print "<table class=\"pickaxe search\">\n";
6050                 my $alternate = 1;
6051                 local $/ = "\n";
6052                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6053                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6054                         ($search_use_regexp ? '--pickaxe-regex' : ());
6055                 undef %co;
6056                 my @files;
6057                 while (my $line = <$fd>) {
6058                         chomp $line;
6059                         next unless $line;
6060
6061                         my %set = parse_difftree_raw_line($line);
6062                         if (defined $set{'commit'}) {
6063                                 # finish previous commit
6064                                 if (%co) {
6065                                         print "</td>\n" .
6066                                               "<td class=\"link\">" .
6067                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6068                                               " | " .
6069                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6070                                         print "</td>\n" .
6071                                               "</tr>\n";
6072                                 }
6073
6074                                 if ($alternate) {
6075                                         print "<tr class=\"dark\">\n";
6076                                 } else {
6077                                         print "<tr class=\"light\">\n";
6078                                 }
6079                                 $alternate ^= 1;
6080                                 %co = parse_commit($set{'commit'});
6081                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6082                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6083                                       "<td><i>$author</i></td>\n" .
6084                                       "<td>" .
6085                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6086                                               -class => "list subject"},
6087                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6088                         } elsif (defined $set{'to_id'}) {
6089                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6090
6091                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6092                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6093                                               -class => "list"},
6094                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6095                                       "<br/>\n";
6096                         }
6097                 }
6098                 close $fd;
6099
6100                 # finish last commit (warning: repetition!)
6101                 if (%co) {
6102                         print "</td>\n" .
6103                               "<td class=\"link\">" .
6104                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6105                               " | " .
6106                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6107                         print "</td>\n" .
6108                               "</tr>\n";
6109                 }
6110
6111                 print "</table>\n";
6112         }
6113
6114         if ($searchtype eq 'grep') {
6115                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6116                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6117
6118                 print "<table class=\"grep_search\">\n";
6119                 my $alternate = 1;
6120                 my $matches = 0;
6121                 local $/ = "\n";
6122                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6123                         $search_use_regexp ? ('-E', '-i') : '-F',
6124                         $searchtext, $co{'tree'};
6125                 my $lastfile = '';
6126                 while (my $line = <$fd>) {
6127                         chomp $line;
6128                         my ($file, $lno, $ltext, $binary);
6129                         last if ($matches++ > 1000);
6130                         if ($line =~ /^Binary file (.+) matches$/) {
6131                                 $file = $1;
6132                                 $binary = 1;
6133                         } else {
6134                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6135                         }
6136                         if ($file ne $lastfile) {
6137                                 $lastfile and print "</td></tr>\n";
6138                                 if ($alternate++) {
6139                                         print "<tr class=\"dark\">\n";
6140                                 } else {
6141                                         print "<tr class=\"light\">\n";
6142                                 }
6143                                 print "<td class=\"list\">".
6144                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6145                                                                file_name=>"$file"),
6146                                                 -class => "list"}, esc_path($file));
6147                                 print "</td><td>\n";
6148                                 $lastfile = $file;
6149                         }
6150                         if ($binary) {
6151                                 print "<div class=\"binary\">Binary file</div>\n";
6152                         } else {
6153                                 $ltext = untabify($ltext);
6154                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6155                                         $ltext = esc_html($1, -nbsp=>1);
6156                                         $ltext .= '<span class="match">';
6157                                         $ltext .= esc_html($2, -nbsp=>1);
6158                                         $ltext .= '</span>';
6159                                         $ltext .= esc_html($3, -nbsp=>1);
6160                                 } else {
6161                                         $ltext = esc_html($ltext, -nbsp=>1);
6162                                 }
6163                                 print "<div class=\"pre\">" .
6164                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6165                                                                file_name=>"$file").'#l'.$lno,
6166                                                 -class => "linenr"}, sprintf('%4i', $lno))
6167                                         . ' ' .  $ltext . "</div>\n";
6168                         }
6169                 }
6170                 if ($lastfile) {
6171                         print "</td></tr>\n";
6172                         if ($matches > 1000) {
6173                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6174                         }
6175                 } else {
6176                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6177                 }
6178                 close $fd;
6179
6180                 print "</table>\n";
6181         }
6182         git_footer_html();
6183 }
6184
6185 sub git_search_help {
6186         git_header_html();
6187         git_print_page_nav('','', $hash,$hash,$hash);
6188         print <<EOT;
6189 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6190 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6191 the pattern entered is recognized as the POSIX extended
6192 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6193 insensitive).</p>
6194 <dl>
6195 <dt><b>commit</b></dt>
6196 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6197 EOT
6198         my $have_grep = gitweb_check_feature('grep');
6199         if ($have_grep) {
6200                 print <<EOT;
6201 <dt><b>grep</b></dt>
6202 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6203     a different one) are searched for the given pattern. On large trees, this search can take
6204 a while and put some strain on the server, so please use it with some consideration. Note that
6205 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6206 case-sensitive.</dd>
6207 EOT
6208         }
6209         print <<EOT;
6210 <dt><b>author</b></dt>
6211 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6212 <dt><b>committer</b></dt>
6213 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6214 EOT
6215         my $have_pickaxe = gitweb_check_feature('pickaxe');
6216         if ($have_pickaxe) {
6217                 print <<EOT;
6218 <dt><b>pickaxe</b></dt>
6219 <dd>All commits that caused the string to appear or disappear from any file (changes that
6220 added, removed or "modified" the string) will be listed. This search can take a while and
6221 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6222 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6223 EOT
6224         }
6225         print "</dl>\n";
6226         git_footer_html();
6227 }
6228
6229 sub git_shortlog {
6230         my $head = git_get_head_hash($project);
6231         if (!defined $hash) {
6232                 $hash = $head;
6233         }
6234         if (!defined $page) {
6235                 $page = 0;
6236         }
6237         my $refs = git_get_references();
6238
6239         my $commit_hash = $hash;
6240         if (defined $hash_parent) {
6241                 $commit_hash = "$hash_parent..$hash";
6242         }
6243         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6244
6245         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6246         my $next_link = '';
6247         if ($#commitlist >= 100) {
6248                 $next_link =
6249                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6250                                  -accesskey => "n", -title => "Alt-n"}, "next");
6251         }
6252         my $patch_max = gitweb_check_feature('patches');
6253         if ($patch_max) {
6254                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6255                         $paging_nav .= " &sdot; " .
6256                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6257                                         "patches");
6258                 }
6259         }
6260
6261         git_header_html();
6262         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6263         git_print_header_div('summary', $project);
6264
6265         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6266
6267         git_footer_html();
6268 }
6269
6270 ## ......................................................................
6271 ## feeds (RSS, Atom; OPML)
6272
6273 sub git_feed {
6274         my $format = shift || 'atom';
6275         my $have_blame = gitweb_check_feature('blame');
6276
6277         # Atom: http://www.atomenabled.org/developers/syndication/
6278         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6279         if ($format ne 'rss' && $format ne 'atom') {
6280                 die_error(400, "Unknown web feed format");
6281         }
6282
6283         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6284         my $head = $hash || 'HEAD';
6285         my @commitlist = parse_commits($head, 150, 0, $file_name);
6286
6287         my %latest_commit;
6288         my %latest_date;
6289         my $content_type = "application/$format+xml";
6290         if (defined $cgi->http('HTTP_ACCEPT') &&
6291                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6292                 # browser (feed reader) prefers text/xml
6293                 $content_type = 'text/xml';
6294         }
6295         if (defined($commitlist[0])) {
6296                 %latest_commit = %{$commitlist[0]};
6297                 my $latest_epoch = $latest_commit{'committer_epoch'};
6298                 %latest_date   = parse_date($latest_epoch);
6299                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6300                 if (defined $if_modified) {
6301                         my $since;
6302                         if (eval { require HTTP::Date; 1; }) {
6303                                 $since = HTTP::Date::str2time($if_modified);
6304                         } elsif (eval { require Time::ParseDate; 1; }) {
6305                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6306                         }
6307                         if (defined $since && $latest_epoch <= $since) {
6308                                 print $cgi->header(
6309                                         -type => $content_type,
6310                                         -charset => 'utf-8',
6311                                         -last_modified => $latest_date{'rfc2822'},
6312                                         -status => '304 Not Modified');
6313                                 return;
6314                         }
6315                 }
6316                 print $cgi->header(
6317                         -type => $content_type,
6318                         -charset => 'utf-8',
6319                         -last_modified => $latest_date{'rfc2822'});
6320         } else {
6321                 print $cgi->header(
6322                         -type => $content_type,
6323                         -charset => 'utf-8');
6324         }
6325
6326         # Optimization: skip generating the body if client asks only
6327         # for Last-Modified date.
6328         return if ($cgi->request_method() eq 'HEAD');
6329
6330         # header variables
6331         my $title = "$site_name - $project/$action";
6332         my $feed_type = 'log';
6333         if (defined $hash) {
6334                 $title .= " - '$hash'";
6335                 $feed_type = 'branch log';
6336                 if (defined $file_name) {
6337                         $title .= " :: $file_name";
6338                         $feed_type = 'history';
6339                 }
6340         } elsif (defined $file_name) {
6341                 $title .= " - $file_name";
6342                 $feed_type = 'history';
6343         }
6344         $title .= " $feed_type";
6345         my $descr = git_get_project_description($project);
6346         if (defined $descr) {
6347                 $descr = esc_html($descr);
6348         } else {
6349                 $descr = "$project " .
6350                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6351                          " feed";
6352         }
6353         my $owner = git_get_project_owner($project);
6354         $owner = esc_html($owner);
6355
6356         #header
6357         my $alt_url;
6358         if (defined $file_name) {
6359                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6360         } elsif (defined $hash) {
6361                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6362         } else {
6363                 $alt_url = href(-full=>1, action=>"summary");
6364         }
6365         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6366         if ($format eq 'rss') {
6367                 print <<XML;
6368 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6369 <channel>
6370 XML
6371                 print "<title>$title</title>\n" .
6372                       "<link>$alt_url</link>\n" .
6373                       "<description>$descr</description>\n" .
6374                       "<language>en</language>\n" .
6375                       # project owner is responsible for 'editorial' content
6376                       "<managingEditor>$owner</managingEditor>\n";
6377                 if (defined $logo || defined $favicon) {
6378                         # prefer the logo to the favicon, since RSS
6379                         # doesn't allow both
6380                         my $img = esc_url($logo || $favicon);
6381                         print "<image>\n" .
6382                               "<url>$img</url>\n" .
6383                               "<title>$title</title>\n" .
6384                               "<link>$alt_url</link>\n" .
6385                               "</image>\n";
6386                 }
6387                 if (%latest_date) {
6388                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6389                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6390                 }
6391                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6392         } elsif ($format eq 'atom') {
6393                 print <<XML;
6394 <feed xmlns="http://www.w3.org/2005/Atom">
6395 XML
6396                 print "<title>$title</title>\n" .
6397                       "<subtitle>$descr</subtitle>\n" .
6398                       '<link rel="alternate" type="text/html" href="' .
6399                       $alt_url . '" />' . "\n" .
6400                       '<link rel="self" type="' . $content_type . '" href="' .
6401                       $cgi->self_url() . '" />' . "\n" .
6402                       "<id>" . href(-full=>1) . "</id>\n" .
6403                       # use project owner for feed author
6404                       "<author><name>$owner</name></author>\n";
6405                 if (defined $favicon) {
6406                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6407                 }
6408                 if (defined $logo_url) {
6409                         # not twice as wide as tall: 72 x 27 pixels
6410                         print "<logo>" . esc_url($logo) . "</logo>\n";
6411                 }
6412                 if (! %latest_date) {
6413                         # dummy date to keep the feed valid until commits trickle in:
6414                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6415                 } else {
6416                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6417                 }
6418                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6419         }
6420
6421         # contents
6422         for (my $i = 0; $i <= $#commitlist; $i++) {
6423                 my %co = %{$commitlist[$i]};
6424                 my $commit = $co{'id'};
6425                 # we read 150, we always show 30 and the ones more recent than 48 hours
6426                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6427                         last;
6428                 }
6429                 my %cd = parse_date($co{'author_epoch'});
6430
6431                 # get list of changed files
6432                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6433                         $co{'parent'} || "--root",
6434                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6435                         or next;
6436                 my @difftree = map { chomp; $_ } <$fd>;
6437                 close $fd
6438                         or next;
6439
6440                 # print element (entry, item)
6441                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6442                 if ($format eq 'rss') {
6443                         print "<item>\n" .
6444                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6445                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6446                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6447                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6448                               "<link>$co_url</link>\n" .
6449                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6450                               "<content:encoded>" .
6451                               "<![CDATA[\n";
6452                 } elsif ($format eq 'atom') {
6453                         print "<entry>\n" .
6454                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6455                               "<updated>$cd{'iso-8601'}</updated>\n" .
6456                               "<author>\n" .
6457                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6458                         if ($co{'author_email'}) {
6459                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6460                         }
6461                         print "</author>\n" .
6462                               # use committer for contributor
6463                               "<contributor>\n" .
6464                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6465                         if ($co{'committer_email'}) {
6466                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6467                         }
6468                         print "</contributor>\n" .
6469                               "<published>$cd{'iso-8601'}</published>\n" .
6470                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6471                               "<id>$co_url</id>\n" .
6472                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6473                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6474                 }
6475                 my $comment = $co{'comment'};
6476                 print "<pre>\n";
6477                 foreach my $line (@$comment) {
6478                         $line = esc_html($line);
6479                         print "$line\n";
6480                 }
6481                 print "</pre><ul>\n";
6482                 foreach my $difftree_line (@difftree) {
6483                         my %difftree = parse_difftree_raw_line($difftree_line);
6484                         next if !$difftree{'from_id'};
6485
6486                         my $file = $difftree{'file'} || $difftree{'to_file'};
6487
6488                         print "<li>" .
6489                               "[" .
6490                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6491                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6492                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6493                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6494                                       -title => "diff"}, 'D');
6495                         if ($have_blame) {
6496                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6497                                                              file_name=>$file, hash_base=>$commit),
6498                                               -title => "blame"}, 'B');
6499                         }
6500                         # if this is not a feed of a file history
6501                         if (!defined $file_name || $file_name ne $file) {
6502                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6503                                                              file_name=>$file, hash=>$commit),
6504                                               -title => "history"}, 'H');
6505                         }
6506                         $file = esc_path($file);
6507                         print "] ".
6508                               "$file</li>\n";
6509                 }
6510                 if ($format eq 'rss') {
6511                         print "</ul>]]>\n" .
6512                               "</content:encoded>\n" .
6513                               "</item>\n";
6514                 } elsif ($format eq 'atom') {
6515                         print "</ul>\n</div>\n" .
6516                               "</content>\n" .
6517                               "</entry>\n";
6518                 }
6519         }
6520
6521         # end of feed
6522         if ($format eq 'rss') {
6523                 print "</channel>\n</rss>\n";
6524         } elsif ($format eq 'atom') {
6525                 print "</feed>\n";
6526         }
6527 }
6528
6529 sub git_rss {
6530         git_feed('rss');
6531 }
6532
6533 sub git_atom {
6534         git_feed('atom');
6535 }
6536
6537 sub git_opml {
6538         my @list = git_get_projects_list();
6539
6540         print $cgi->header(
6541                 -type => 'text/xml',
6542                 -charset => 'utf-8',
6543                 -content_disposition => 'inline; filename="opml.xml"');
6544
6545         print <<XML;
6546 <?xml version="1.0" encoding="utf-8"?>
6547 <opml version="1.0">
6548 <head>
6549   <title>$site_name OPML Export</title>
6550 </head>
6551 <body>
6552 <outline text="git RSS feeds">
6553 XML
6554
6555         foreach my $pr (@list) {
6556                 my %proj = %$pr;
6557                 my $head = git_get_head_hash($proj{'path'});
6558                 if (!defined $head) {
6559                         next;
6560                 }
6561                 $git_dir = "$projectroot/$proj{'path'}";
6562                 my %co = parse_commit($head);
6563                 if (!%co) {
6564                         next;
6565                 }
6566
6567                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6568                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6569                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6570                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6571         }
6572         print <<XML;
6573 </outline>
6574 </body>
6575 </opml>
6576 XML
6577 }